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Power Requirements and Specs For Popular Graphic Cards Guide

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a b ) Power supply
a b U Graphics card
April 2, 2010 4:08:31 PM

This is a reference to help guide you in the right direction for a power supply based on you graphics card.

Tom's did a really good review sometime back on Graphic's cards and Total System power consumption its a little old but still a good read.
Tom's Hardware Power Usage Review

Power Supplies
Guide to buying PSUs
A list of PSUs (a bit out of date but most recommendations still apply)

  • Suggested Brands
    Corsair, Antec, SilverStone, Seasonic, and OCZ. Read the reveiws for the OCZ's some arent as good as others so be careful when choosing a power supply.

  • 350 watt This will be enough for any processor and an entry level GPU

  • 400 watt This will be enough for any processor with a low to mid range GPU

  • 500 watt This will be enough for any processor and just about any mid range GPU

  • 550 to 650 watt This will be more then enough to run just about any single GPU, except for the HD 5970,HD 4870 x2, GTX 480, and GTX 295.

    For Dual GPU setups add another 75 to 100 watts for low to mid range GPUS for the upper midrange to the high end add a 150 watts on average per GPU. See my list for more info on some popular GPUs and what I suggest for them.

    To figure out how many amps you need on the 12 volt rail use this formula (watts / 12 = amps) so if the card requires 650 watts simply divide 650 by 12. This formula only works for 12 volt for different voltages there are different dividers.
  • 650/12=54.16 so if it requires 650 watt PSU it will need 54 amps on the 12 volt rail, for PSU with multiple 12 volt rails you will need to find the max combined output for it. Now this number may be a bit higher then it actually needs but it will give you a rough estimate since AMD and Nvidia dont give the amperage requirements for all their cards.

    High End ATI Cards

    Radeon HD 6970

    Core Engine Clock: 880 MHz
    Stream Processors: 1536
    Memory Size: 2GB GDDR5
    Memory Clock: 1375 MHz
    Interface: 256-bit
    Max Power Consumption: 287 Watts
    Average Consumption: 157 Watts
    Idle: 22 Watts

  • A 550 Watt unit with one 8 pin PCI-E connector is recommended. Power supply should have at the very least 38 Amps on the 12 volt rails combined.
  • For Crossfire I would recommend getting a 750 watt unit with a minimum of 56 Amps combined on the 12 volt rail.

    Radeon HD 6870

    Core Engine Clock: 900 MHz
    Stream Processors: 1120
    Memory Size: 1GB GDDR5
    Memory Clock: 1050 MHz
    Max Power Consumption: 163 Watts
    Average Consumption: 108 Watts
    Idle: 17 Watts

  • A 500 Watt unit with two 6-pin PCI Express┬« power connectors is recommended.
  • For Crossfire I would recommend nothing less than 600 watts.


    Radeon HD 5970 (Hemlock) 2GB 512 (256 x 2)-bit GDDR5

    Core Clock: 2x725 MHz
    Stream Processors: 3200 (1600 x 2)
    Effective Memory clock: 4000 MHz
    Power consumption on Idle: 51 watts
    Power consumption full load: 300+watts

  • This is a sick graphics card will give great performance for years to come will need at least 650 watt PSU with one 6 pin PCI Express connector and 2 150 watt 8 pin connectors but this will definitely test any 650 watt PSU to its max. If you plan on overclocking it I would recommend a 750 watt PSU to allow some head room. 850 watt PSU is recommended for crossfire but I would suggest going with a 1000watt PSU for this beast to allow for overclocking.
  • Recommended 54 Amps on the 12 volt rail for a single card and 70 Amps for Crossfire.

    Radeon HD 4870x2 2GB 512-bit(256-bitx2) GDDR5 N/A not manufactured anymore

    Core Clock: 750mhz x2
    Stream Processors: 3200(1600x2)
    Effective Memory Clock: 3600Mhz
    Power Consumption at Idle: 49 watts
    Power Consumption at Full Load: 300+watts

  • Recommended is a 650 watt PSU with one 6 pin PCI Express connector and one 8pin connector. 1000 watt PSU with two 6 pin and two 8 pin connectors is recommended for crossfire.
  • Recommended 54 Amps on the 12 volt rail for single card and 70 Amps for Crossfire.

    Radeon HD 5870 2GB 256-bit GDDR5 Eyefinity 6 Edition

    Core Clock: 850MHz
    Stream Processors: 1600
    Effective Memory Clock: 4800 MHz
    Power consumption on Idle: 34watts
    Power consumption at full load: 228watts

  • 600 Watt or greater power supply is recommended with one 75W 6-pin and one 150W 8-pin PCI Express power connector required 900 Watt and 2 6-pin and 2 8-pin connectors for CrossFireX
  • Recommended 50 Amps pn 12 volt rail for single card 75 Amps for crossfire.

    Radeon HD 5870 (Cypress XT) 1GB 256-bit GDDR5 $399.99 to $499.99

    Core Clock: 850MHz
    Stream Processors: 1600
    Effective Memory Clock: 4800 MHz
    Power consumption on Idle: 27 watts
    Power consumption at full load: 190 watts

  • Recommended is a 500 watt PSU with two 6 pin 75watt PCI Express connectors. If you plan to crossfire you will need a 750 watt PSU.
  • Recommended 42 Amps on the 12 volt rail for single card and 63 Amps for Crossfire.

    Radeon HD 5850 (Cypress Pro) 1GB 256-bit DDR5 $299.99 to $369.99

    Core Clock: 725 MHz
    Stream Processors: 1440
    Effective Memory Clock: 4000mhz
    Power Consumption on Idle: 27 watts
    Power Consumption on Full Load: 150 watts

  • Recommended is a 500watt PSU with two 75 watt 6 pin PCI express connectors. 600 watt PSU with four 6 pin connectors to run crossfire is recommended but I suggest a 650 watt for some head room.
  • Recommended 36 Amps on the 12 volt rail for single card and 50 Amps for Crossfire.

    Radeon HD 5830 1GB 256-bit GDDR5 $229.99 to $279.99

    Core Clock: 800 MHz
    Stream Processors: 1120
    Effective Memory Clock: 4000 MHz
    Power Consumption at Idle: 25 watts
    Power Consumption at Full Load: 175 watts

  • Recommended is a 500 watt PSU with two 75 watt PCI Express connectors. 600watt with four 6 pin connectors is recommended to run crossfire I would suggest 650 watt for some head room.
  • Recommended 36 Amps on the 12 volt rail for single card and 50 Amps for Crossfire.

    For all the above Cards you should have atleast 40 amps on the 12 volt rail.

    Mid Range ATI Cards

    Radeon HD 5770 (Juniper XT) 1GB 128-bit GDDR5 $134.99 to $179.99

    Core Clock: 850 MHz
    Stream Processors: 800
    Effective Memory Clock: 4800 MHz
    Power Consumption at Idle: 18 watts
    Power Consumption at Full Load: 108 watts

  • Recommended is a 450 watt PSU with one 75 watt 6 pin PCI Express connector, but could be run on a quality 400 watt PSU. 600 watt with two 6 pin connectors will be needed for crossfire.
  • Recommended 37 Amps on 12 volt rail for single card and 50 Amps for crossfire. This card can run on lesser this is just recommended and will be able to run with at least 30 Amps on 12 volt rail.

    Radeon HD 4850 1GB 256-bit GDDR3 $97.99 to $129.99

    Core Clock: 625mhz
    Stream Processors: 800
    Effective Memory Clock: 1900mhz
    Power Consumption at Idle: 58 watts
    Power Consumption at Full Load: 187 watts

  • Recommended is a 450 watt PSU with one 75 watt PCI Express connector. A 550 watt PSU is recommended for crossfire I suggest 600 watt for some head room.
  • Recommended 36 Amps on 12 volt rail for single card and 46 Amps for Crossfire. This card can run on lesser this is just recommended and will be able to run with at least 30 Amps on 12 volt rail.

    Entry Level Gaming cards

    Radeon HD 5670 (Redwood) 1GB 128-bit GDDR5 $79.99 to $129.99

    Core Clock: 775mhz
    Stream Processors: 400
    Effective Memory Clock: 4000 MHz
    Power Consumption at Idle: 15 watts
    Power Consumption at Full Load: 64 watts

  • Recommended is a 400 watt PSU to run this card no 6 pin connectors required this card. You will have no problems running on a 300 to 350watt PSU. 500 watt PSU is reccommended to crossfire this card you could get away with using 450 watt no problem.
  • Recommended 30 Amps on the 12 volt rail for single card and 41 Amps for crossfire but this card will run on units with as little as 25 Amps on 12 volt rail.

    Radeon HD 4670 1GB 128-bit DDR3 $62.99 to $122.99

    Core Clock: 600mhz - 750mhz
    Stream Processors: 320
    Effective Memory Clock:1600mhz
    Power Consumption at Idle: 14 watts
    Power Consumption at Full Load: 64 watts
  • It is recommended to have a 400 watt PSU but you will be able to run this with a 350 watt PSU no problem on most systems and 300 watt if its a good PSU. The 4670 does not require any additional power connectors. For Crossfire 550 watt is recommended but you will have no problem running this on 400 to 450 watt PSU.
  • Recommended 30 Amps on the 12 volt rail for single card and 41 Amps for crossfire but this card will run on units with as little as 25 Amps on 12 volt rail.

    For all the above Cards you should have atleast 30 amps on the 12 volt rail.

    Low Powered Cards

    Radeon HD 5450 (cedar) 1GB 64-bit DDR3 & 512MB DDR2 Low Profile $42.99 to $69.99

    Core Clock: 650mhz
    Stream Processors: 80
    Effective Memory Clock: DDR2 800mhz DDR3 1600mhz
    Power Consumption at Idle: 6.4 watts
    Power Consumption at Full Load: 19.1 watts

  • They suggest 400 watt PSU but I have no doubts that you can run this with a 300 to watt PSU no 6 pin connector needed. No crossfire for this card.

    Radeon HD 4350 512MB 64-bit DDR2 Low Profile card $39.99 to $124.99

    Core Clock: 600 MHz
    Stream Processors: 80
    Effective Memory Clock: 1600 MHz
    Power Consumption at Idle: 5 watts
    Power consumption at Full Load: 25 watts
  • 300 watt PSU will be more than enough for this card. 350 watt for crossfire. The more expensive ones for this model are the ones that support crossfire.

    Note: Radeon HD 4550's are the same as the 4350's just with 1GB memory instead of 512MB Power draw is Identical between the two. They would make great low powered HTPC video cards.
    a b ) Power supply
    a b U Graphics card
    April 2, 2010 4:11:23 PM

    NVIDIA Cards


    High End NVIDIA Cards

    GeForce GTX 580

    Cuda Cores: 512
    Graphics Clock: 772 MHz
    Processor Clock: 1544 MHz
    Memory Clock: 2004 Mhz
    Standard Memory Size: 1536 MB GDDR5
    Interface: 384-bit
    Max Power Consumption: 244 Watts

    Recommended Power: 600 Watts with one 6 pin and one 8 pin PCI-E connectors. For SLI 750 watts is recommended and I would not go any lower then that for this card in SLI. In single card operation a quality 550 watt unit will power this fine but if you are buying the 580 I doubt you would be running it on a small unit anyways.

    GeForce GTX 570

    Cuda Cores: 480
    Graphics Clock: 732 MHz
    Processor Clock: 1464 MHz
    Memory Clock: 1900 Mhz
    Standard Memory Size: 1280 MB GDDR5
    Interface: 320-bit

    Max Power consumption: 219 Watts
    Recommended Power: 550 watt with Two 6-pin PCI-E connectors. For SLI 750 watt unit is recommended, but should run fine on a good 650 watt unit.
  • This card should have no problems with as small as a 450 watt unit as long as its a quality unit.

    GeForce GTX 480 (Fermi) 1536MB 384-bit GDDR5

    Core Clock: 700mhz
    Shader Clock: 1401mhz
    Cuda Cores: 480
    Effective Memory Clock: 3696mhz
    Power Consumption at Idle: 54 watts
    Power Consumption at Full Load: 320 watts plus

  • Now this GTX 480 is a true pig when it comes to power requirements Nvidia says minumum of 600 watt with one 6 pin PCI Express connector and one 8 pin connector with. In my opinion I wouldnt put anything less than a 650 watt PSU with this card this will allow for overclocking head room. In SLI you gonna need dam near every bit of a 1000 watt power supply.
  • Recomended is 50 Amps on the 12 volt rail and 71 Amps for SLI.
    Nvidia seems to be recommending to use a power supply with a single 12 volt rail to power this card but plenty of people have run this card with power supplies with multiple rails.

    GeForce GTX 470 (Fermi) 1280MB 320-bit GDDR5

    Core Clock: 607mhz
    Shader Clock: 1215mhz
    Cuda Cores: 448
    Effective Memory Clock: 3348mhz
    Power Consumption at Idle: 40-45watts
    Power Consumption at Full Load: 250 watts plus

  • The recommended power supply is 550 watt with two 6 pin PCI Express connectors. For SLI 700 watt power supply is recommended I suggest 750 watts to give some head room.
  • Recommended 46 Amps on the 12 volt rail and 58 Amps for SLI.

    GeForce GTX 465 (Fermi) 1024MB 256-bit GDDR5

    Core Clock: 607 MHz
    Shader Clock:1215 MHz
    Cuda Cores: 352
    Effective Memory Clock: 3206 MHz
    Power Consumption at Idle: 33 watts
    Power Consumption at Full Load: 200 watts

  • The recommended power supply is 550 watt with two 6 pin PCI Express connectors. For SLI 700 watt power supply is recommended.
  • Recommended 46 Amps on the 12 volt rail and 58 Amps for SLI.

    GeForce GTX 460 (Fermi) 768MB-1GB 192-256bit GDDR5

    Core Clock: 675mhz
    Shader Clock: 1350mhz
    Cuda Cores: 336
    Effective Memory Clock:
    Power Consumption at Idle: 29 watts
    Power Consumption at Full Load: 180 watts
  • The recommended power supply is 450 watt with two 6 pin PCI Express connectors. For SLI 650 watt power supply is recommended.
  • Recommended 36 Amps on the 12 volt rail 50 Amps for SLI.

    GeForce GTX 295 1792MB 896-bit(448x2) DDR3

    Core Clock: 576mhz
    Shader Clock: 1242mhz
    Cuda Cores: 480 (240x2)
    Effective Memory Clock: 2000mhz
    Power Consumption at Idle: 55 watts
    Power Consumption at Full Load: 318 watts

  • The recommended power supply is 680 watts with one 6 pin PCI Express connector and one 8 pin connector. For SLI 750 to 850 watt will be more then enough power to run it. They say add 250 watt per card in SLI in reality about 175-200 watt extra per card will be plenty.
  • Recomended is 56 Amps on the 12 volt rail for single card and 62 Amps for SLI.

    GeForce GTX 285 1GB 512-bit DDR3

    Core Clock: 648mhz
    Shader Clock: 1476mhz
    Cuda Cores: 240
    Effective Memory Clock: 2484mhz
    Power Consumption at Idle: 29 watts
    Power Consumption at Full Load: 210 watts

  • The recommended power supply is 550 watt with two 6 pin PCI Express connectors. A good 500 watt power supply will run this with no trouble. For SLI 700 watt PSU is recommended.
  • Recommended is 46 Amps on the 12 volt rail and 58 Amps for SLI.

    GeForce GTX 275 896MB 448-bit GDDR3

    Core Clock: 633 MHz
    Shader Clock: 1404 MHz
    Cuda Cores: 240
    Effective Memory Clock: 2268 MHz
    Power Consumption at Idle: 31 watts
    Power Consumption at Full Load: 225 watts

  • The recommended power supply is 550 watt with two 6 pin PCI Express connectors. A good 500 watt power supply will run this fine. 650 Watt is recommended for SLI.
  • Recommended 46 Amps for the 12 volt rail and 54 Amps for SLI.

    For all the above Cards you should have atleast 40 amps on the 12 volt rail.


    Mid Range NVIDIA Cards

    GeForce GTX 260 896MB 448-bit GDDR3

    Core Clock: 576mhz
    Shader Clock: 1242mhz
    Cuda Cores: 192
    Effective Memory Clock: 1998mhz
    Power Consumption at Idle: 30 watts
    Power Consumption at Full Load: 165watts

  • The recommended is 500 watt two 6 pin PCI Express connectors. A good 450 watt power supply will work. For SLI you should have at least a 600 watt power supply.
  • Recommended 42 Amps on the 12 volt rail for single card and 50 Amps for SLI.

    GeForce GTS 250 1GB 256-bit GDDR3

    Core Clock: 738 MHz
    Shader Clock: 1836 MHz
    Cuda Cores: 128
    Effective Memory Clock: 2200mhz
    Power Consumption at Idle: 41 watts
    Power Consumption at Full Load: 174 watts

  • The Recommended power supply is 450 watt with one 6 pin PCI Express connector. This card will run just fine on a 400 watt power supply. For SLI a good 550 watt power supply will be more than enough to run them.
  • Recommended 32 Amps on the 12 volt rail for single card and 42 Amps for SLI.
  • The 9800GTX is basically the same exact card so power requirements are the same for it.

    GeForce 9800GT 512MB 256-bit GDDR3

    Core Clock: 600mhz
    Shader Clock: 1500mhz
    Cuda Cores: 112
    Effective Memory Clock: 1800 MHz
    Power Consumption at Idle: 34 watts
    Power Consumption at Full Load: 120 watts
  • The Recommended power supply is 400 watt with one 6 pin PCI Express connector. I know from my own experience that this card has no problems running on a 350 watt power supply. For SLI a good 500 watt power supply will be perfect.
  • Recommended 33 Amps on the 12 volt rail for single card and 42 Amps for SLI.

    For all the above Cards you should have at least 30 amps on the 12 volt rail.

    Low End Low Power Cards

    GeForce GT 240 512MB or 1GB 128-bit GDDR5

    Core Clock: 550 MHz
    Shader Clock: 1340 MHz
    Cuda Cores: 96
    Effective Memory Clock: 3400 MHz
    Power Consumption at Idle: 12 watts
    Power Consumption at Full Load: 85 watts
  • The recommended power supply is 300 watts no additional power needed. This card can run with a 250 watt power supply just fine. No SLI capabilities on this card.

    GeForce 9600 GT 512MB 256-bit GDDR3
    There are 2 models of this card a 96 watt version and a 59 watt version.

  • 96 watt
    Core Clock: 650 MHz
    Shader Clock:1625 MHz
    Cuda Cores: 64
    Effective Memory Clock: 1800 MHz
    Power Consumption at Idle:7 watts
    Power Consumption at Full Load: 96 watts
  • 59 watt
    Core Clock: 600 MHz
    Shader Clock: 1500 MHz
    Cuda Cores: 64
    Effective Memory Clock:
    Power Consumption at Idle: 6 watts
    Power Consumption at Full Load: 59 watts
  • For these cards a 300 watt power supply is more than plenty to run them. Unlike the GT 240 this card can be in a SLI configuration in SLI you will need 400 watt power supply if you have the 96 watt version, and 350 watt power supply for the 59 watt version.

    More still to come.
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    a b ) Power supply
    a c 130 U Graphics card
    April 2, 2010 4:21:54 PM

    Your power requirements are dearly overstated, but very nice effort.
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    Related resources
    a b ) Power supply
    a b U Graphics card
    April 2, 2010 4:29:43 PM

    All my power requirements are straight from AMD the only one I feel I overstated a little was the 5970 in crossfire and the 4870x2 in crossfire the rest are exactly what AMD says and then I give my opinion on what I would run.
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    a c 126 U Graphics card
    April 2, 2010 4:32:00 PM

    Good thread. One thing I noticed is that you have the 5870's core clock at 870mhz when its actually 850mhz
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    a b ) Power supply
    a c 130 U Graphics card
    April 2, 2010 4:32:05 PM

    Exactly. But we know better here. An HD5770 will run off of a 450Watt PSU, an HD5670 will run off a 250Watt PSU, etc. The only time you ever buy a 250Watt PSU is with an OEM machine, which won't be overclocked.
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    a b ) Power supply
    a b U Graphics card
    April 2, 2010 4:37:09 PM

    Quote:
    Exactly. But we know better here. An HD5770 will run off of a 450Watt PSU, an HD5670 will run off a 250Watt PSU, etc. The only time you ever buy a 250Watt PSU is with an OEM machine, which won't be overclocked.

    Well I have the 450 watt recommended for 5770 600 is for crossfire. I dont think you read through eveything i said 400watt was reccomended for the 5670 but then i said 300 or 350 watt would run it fine.
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    a b ) Power supply
    a c 130 U Graphics card
    April 2, 2010 4:45:07 PM

    HD4850 uses one 6pin.
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    a b ) Power supply
    a b U Graphics card
    April 2, 2010 5:01:48 PM

    would this help?



    while typical gaming usage



    while benching




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    a b ) Power supply
    a b U Graphics card
    April 2, 2010 6:02:00 PM

    I would drop the 5830 from the list of "popular" cards since its really not a good card compared to 5770 and 5850. If you are gonna keep it there, you should add the 5750, but I would just drop both.
    Also- like others are saying, it is fine to list the ATI suggested PSU requirements, but I would also put in more accurate minimum requirements for a standard desktop type system with that graphics card.
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    a b ) Power supply
    a b U Graphics card
    April 2, 2010 6:12:05 PM

    Thanks for the suggestions its still a work in progress. The 5830 might not be that popular but I do see quite alot of people ask about it in the cpu and home built sections. I never see anyone ask about the 5750

    After I am done with the nvidia section I will tweak per suggestions thats what is great about a forum.
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    a b ) Power supply
    a b U Graphics card
    April 2, 2010 11:17:27 PM

    Update

    Added Nvidia cards and re arranged the setup
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    a b ) Power supply
    a b U Graphics card
    April 4, 2010 1:50:55 AM

    I have just got this moved from the graphic cards section to here I thought it fit better here.
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    a c 248 ) Power supply
    a b U Graphics card
    April 4, 2010 2:39:16 AM

    Actually I think it is best to state the manufacturers recommendations even though they are overestimated. The reason for that is that there are far too many low budget, low quality power supplies of questionable performance and value. There are far too many people who spend quite a bit of money on a graphics card and then turn right around and buy those cheap psu's.
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    a b ) Power supply
    a b U Graphics card
    April 4, 2010 2:45:33 AM

    When I say The Recommended is that is what the AMD and NVIDA website suggest then I write my suggestion. You have anything else you think I should include in this?
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    a c 144 ) Power supply
    a b U Graphics card
    April 4, 2010 3:23:01 PM

    JohnnyLucky said:
    The reason for that is that there are far too many low budget, low quality power supplies of questionable performance and value. There are far too many people who spend quite a bit of money on a graphics card and then turn right around and buy those cheap psu's.


    That's also why the PSU calculators crank in an overly pessimistic fudge factor.

    There is a lot of junk out there. There's even some junk masquerading as good PSU's. OCZ comes to mind.
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    a b U Graphics card
    April 4, 2010 4:02:22 PM

    jsc said:
    That's also why the PSU calculators crank in an overly pessimistic fudge factor.

    There is a lot of junk out there. There's even some junk masquerading as good PSU's. OCZ comes to mind.

    Yea it depends on which model you get with OCZ you have to be careful some of them are junk but they do have a couple that are half decent if you are on a budget.
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    a b ) Power supply
    April 4, 2010 7:00:01 PM

    It's nice to see a guide on this kinda stuff, particularly when we see so many questions on this subject. Funny enough I was thinking earlier how someone should do a guide on PSUs etc particularly graphics cards requirements so its nice to see this up. Sticky when finished ;) 
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    a b U Graphics card
    April 4, 2010 8:02:35 PM

    Pretty good. A general guide will be overstated, as we know that total wattage does not tell the entire story.
    I think an additional suggested/required amperage rating would be a good addition. I fell the amps supplied on the 12 volt rails of a particular PSU is critical information as well.
    Just my 2 cents.
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    a b ) Power supply
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    April 5, 2010 12:15:02 AM

    jitpublisher said:
    Pretty good. A general guide will be overstated, as we know that total wattage does not tell the entire story.
    I think an additional suggested/required amperage rating would be a good addition. I fell the amps supplied on the 12 volt rails of a particular PSU is critical information as well.
    Just my 2 cents.

    Yea I was actually thinking of doing that, it will be my next addition
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    a c 77 ) Power supply
    a b U Graphics card
    April 5, 2010 2:05:53 AM

    I have added a link to this thread to both of my stickies in the Homebuilt forum.
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    a b ) Power supply
    a b U Graphics card
    April 5, 2010 2:46:38 AM

    Thanks
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    April 5, 2010 9:35:38 PM

    nice work, great info, but I have a question

    you said gtx 295 needs 318 watt which is more than the gtx480 and for the sli I qoute "For SLI 750 to 850 watt will be more then enough power to run it" how come the fermi needs 1000 w while the 295 which is more power hungry requires 750 - 850 w can you explain it to me.
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    April 5, 2010 9:53:35 PM

    bkm23 said:
    nice work, great info, but I have a question

    you said gtx 295 needs 318 watt which is more than the gtx480 and for the sli I qoute "For SLI 750 to 850 watt will be more then enough power to run it" how come the fermi needs 1000 w while the 295 which is more power hungry requires 750 - 850 w can you explain it to me.

    Nvidia suggests 680 watts for the 295 and they say add 250 watts per card now from what we know since the card has been around for awhile it can run on less then what they say as for the new fermi no one know for certain really yet. Now for the fermi they suggest 1000 watt for SLI I believe the only reason I can think of they suggest a higher amount for the fermi is that they know that the card could use alot more power then what they suggest it does.
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    April 5, 2010 10:13:23 PM

    thanks that explains alot, we still have to wait for a retail fermi card to find out, and another question does it matter if the psu is 80% silver or gold. some say that 750 w 80 silver equals 940w and 850 equals more than 1000,, well i have a hx 750w corsair and a friend said that it can run gtx480 in sli but the fan will spin louder. Ill wait for the actual reviews after 12th april ans see
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    a b ) Power supply
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    April 5, 2010 11:11:30 PM

    bkm23 said:
    thanks that explains alot, we still have to wait for a retail fermi card to find out, and another question does it matter if the psu is 80% silver or gold. some say that 750 w 80 silver equals 940w and 850 equals more than 1000,, well i have a hx 750w corsair and a friend said that it can run gtx480 in sli but the fan will spin louder. Ill wait for the actual reviews after 12th april ans see


    Your Corsair hx750 is a great power supply and can power just about any dual GPU setup but like I said before we dont know enough about the GTX 480 to be sure if it would. I think it could but you might have some stability issues when you push ths cards. Now to your corsair can produce almost 900 watts in the right conditions as long as its staying cool so it probably could if it was some no name brand no you wouldnt have a chance in hell of running dual GTX 480s and that is why NVIDIA and AMD overstate there power requirements. So your freind is right it has a very good chance of running them but I would feel safer if it was atleast an 850 watt PSU for those cards.

    As for the explanation of the 80 plus certifications check out this site.
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    April 9, 2010 5:52:02 AM

    Need help. Just a tech question... I own a Dell XPS 420 w/ Quad Core Q8200 @2.33Ghz 6gb DDR2 RAM @ 800mhz with a 375 watt PSU. My current video card is crap. I have a ATI Radeon 3450 that I want to upgrade. Only issue is that the Video cards I want to buy all recommend PSU's with over 450 watts. DELL told me I could only upgrade my PSU to 425 watts??? Is this accurate? Would I blow out my motherboard or something if I purchase a higher wattage PSU? I am obivously not the most computer knowledable but I feel confident I can do the upgrade myself. I hope anyone with expert knowledge will provide some sound advise as Dell has been no help what so ever. I have spent hours going round and round. Their tech support rep knew less about computer components and their function than myself. The rep couldn't even answer basic motherboard specs for me so any advise would be helpful. I am hoping to purchase a mid to upper range GPU with the needed PSU to upgrade my system and just want to make sure I buy the best compatible choices. Any help would be so appreciated. Thank you. Nic
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    April 9, 2010 3:17:23 PM

    nicL said:
    Need help. Just a tech question... I own a Dell XPS 420 w/ Quad Core Q8200 @2.33Ghz 6gb DDR2 RAM @ 800mhz with a 375 watt PSU. My current video card is crap. I have a ATI Radeon 3450 that I want to upgrade. Only issue is that the Video cards I want to buy all recommend PSU's with over 450 watts. DELL told me I could only upgrade my PSU to 425 watts??? Is this accurate? Would I blow out my motherboard or something if I purchase a higher wattage PSU? I am obivously not the most computer knowledable but I feel confident I can do the upgrade myself. I hope anyone with expert knowledge will provide some sound advise as Dell has been no help what so ever. I have spent hours going round and round. Their tech support rep knew less about computer components and their function than myself. The rep couldn't even answer basic motherboard specs for me so any advise would be helpful. I am hoping to purchase a mid to upper range GPU with the needed PSU to upgrade my system and just want to make sure I buy the best compatible choices. Any help would be so appreciated. Thank you. Nic


    Like I said in your original post dell has no clue what they are talking about you can use however big of PSU you want and need. That Dell PSU can handle most cards just fine something like an HD 5770 should be pretty safe on that PSU but if you want you can put any PSU you want in that box it uses a standard ATX power supply so there will be no problems in upgrading it.
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    April 10, 2010 1:51:09 AM

    Thank you so much for taking the time and consideration to respond. I appreciate and will take you advice. NicL.
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    April 10, 2010 2:01:25 AM

    Your very welcome any other questions feel free to mpost a new thread or you can send me a message.

    Good Luck
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    April 12, 2010 5:01:13 PM

    Do you plan to updated all of the Power Requirements to list how many amps is recommended on the 12V Rail or just the higher end cards??
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    April 12, 2010 8:39:50 PM

    Yea I been meaning to do that I will try to get time tonight to update it.
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    April 12, 2010 11:47:46 PM

    this was good.
    thanks for the charts and detailed review on each cards
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    April 14, 2010 3:27:16 AM

    tecmo34 said:
    Do you plan to updated all of the Power Requirements to list how many amps is recommended on the 12V Rail or just the higher end cards??


    Updated Amps for all cards.
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    April 14, 2010 10:11:11 PM

    this is a good thread, but one thing that u mentioned 5770 as mid range card but actually it closely comes under HIGH END CARDS...... wat do u say, as we all know its the solid card which supports higher resolution games(1920x1080)
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    April 14, 2010 11:20:28 PM

    chaitanya_mkin said:
    this is a good thread, but one thing that u mentioned 5770 as mid range card but actually it closely comes under HIGH END CARDS...... wat do u say, as we all know its the solid card which supports higher resolution games(1920x1080)

    That is why I have it at the top of the mid range cards. Its close its a very solid performer but it really does fall into the mid range category for 1 real main reason and thats its price at about $179.99 it is priced as a mid level card.
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    April 14, 2010 11:41:31 PM

    which power supply will u suggest for this solid performer dude, make sure that its having crossfire/crossfireX compatibility also.......
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    April 14, 2010 11:42:44 PM

    also wats the difference btwn crossfire/crossfireX tech.
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    April 15, 2010 2:14:27 AM

    chaitanya_mkin said:
    which power supply will u suggest for this solid performer dude, make sure that its having crossfire/crossfireX compatibility also.......


    To leave your self plenty of head room for overclocking and crossfire I would get a 650 watt unit.

    I like Corsair power supplies alot they are built so well and really are priced pretty good for the Quality of unit you get.

    CORSAIR CMPSU-650TX 650W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified
    http://www.newegg.com/Product/Product.aspx?Item=N82E168...
    The Corsair 550 watt unit would be able to run it no problem but its only a $5 difference between units so might as well get the 650 watt unit.

    Now I am not an expert on crossfire but from what I know is that the differences is that crossfire was the first generation of ATI's dual GPUs setups and they had to be the same model of cards to run (eg. 3850 3850) and you had to use a Y connector on the DVI dongle to connect the cards. CrossfireX was the second generation of their multiple GPU setup which allowed to use more then 2 cards and they also incorporated the straps to connect the cards internally. CrossfireX also allows you to use different models of cards together (eg. 4870x2 4850).

    There may be a little more to this but thats as much as I know I have always used Nvidia cards for all my setups and know more about SLI so hope this helps a little I am sure if you google it you will find tons of info on it that could maybe explain it better.
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    April 21, 2010 2:05:29 AM

    why only nvidia? i do not really prefer one or the other, but nvidia cards seem too expensive for their slower than ati performance...
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    April 21, 2010 1:17:38 PM

    I still use a 9800 GTX it still fits my needs fine. When I do upgrade my system I will probably go for an ATI card. I also want to see what else Nvidia is coming out with but if their new line up doesn't show some real performance I will get an HD5870 but I am waiting since its a little out of my reach at the moment.
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    April 22, 2010 12:58:52 PM

    nicL said:
    Need help. Just a tech question... I own a Dell XPS 420 w/ Quad Core Q8200 @2.33Ghz 6gb DDR2 RAM @ 800mhz with a 375 watt PSU. My current video card is crap. I have a ATI Radeon 3450 that I want to upgrade. Only issue is that the Video cards I want to buy all recommend PSU's with over 450 watts. DELL told me I could only upgrade my PSU to 425 watts??? Is this accurate? Would I blow out my motherboard or something if I purchase a higher wattage PSU? I am obivously not the most computer knowledable but I feel confident I can do the upgrade myself. I hope anyone with expert knowledge will provide some sound advise as Dell has been no help what so ever. I have spent hours going round and round. Their tech support rep knew less about computer components and their function than myself. The rep couldn't even answer basic motherboard specs for me so any advise would be helpful. I am hoping to purchase a mid to upper range GPU with the needed PSU to upgrade my system and just want to make sure I buy the best compatible choices. Any help would be so appreciated. Thank you. Nic



    You have to understand who you are talking too. You are talking to someone who will only take you down a line of reasoning that will sell you more Dell stuff. That is what they are paid to do. The reason they say 425 watts is the max, is because that is the largest PSU Dell offers for your system. If you want to do more on your own, then you are on your own! There are more important things however, much more important, than total wattage. That is why I asked SAAIELLO to list these numbers as well if you are going to all the trouble to a comprehensive power requirement listing. When a card manufacturer says "You need 450 watts", that is a way generalized statement that takes into consideration there are many cheap made PSU's out there. What is most important when considering a video card is number of amps the 12 volt rails can push in your PSU. In other words, a well made 375 watt PSU can actually be a better stronger unit than a 550 watt rated cheap unit. Now, having said all that, Dell uses very good PSU's. Very good. Your 375 watt PSU should run most mid range modern ATI cards just fine.
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    April 22, 2010 3:02:47 PM

    Dell psus are geat? R u sure, b cuz they dont seem built very well...
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    April 22, 2010 3:05:23 PM

    you guys say most of ocz psu are junk and there are some good ones, which leads to my question: is the OCZ ModXStream Pro 600W Power Supply of any exception? it comes down to my budget ($80) and provides 25amps for the 5770 that i'll be using soon.

    many thanks.
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    April 22, 2010 8:19:04 PM

    That is one of OCZ better PSU's but for around $80 there are better PSU's to be had Antec and Corsair both have a few. If you are just running 1 5770 then all you need is a 450 watt PSU.

    Corsair 550 watt 74.99 after $10.00 rebate
    http://www.newegg.com/Product/Product.aspx?Item=N82E168...

    This will be more then you need but will leave you with plenty of head room for upgrade. Also is a much more higher quality then the OCZ.

    I have noticed that the OCZ model you listed goes for about $50 after mail in rebate so if you get it for that its not that bad of a deal but if you are paying $80 go with the Corsair.
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    April 24, 2010 2:44:29 PM

    ^ I bought an OCZ psu and am running on 2x5770s in crossfire, do you recommend that I change my psu? It's such a waste though, It's still new(only a month old)
    I got the one mentioned above which is the OCZ 600W ModxStream pro which has two 12V rails@25A each. Is it really that crappy? I should have done my homework first >_<
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    April 25, 2010 2:35:23 PM

    vertical777 said:
    ^ I bought an OCZ psu and am running on 2x5770s in crossfire, do you recommend that I change my psu? It's such a waste though, It's still new(only a month old)
    I got the one mentioned above which is the OCZ 600W ModxStream pro which has two 12V rails@25A each. Is it really that crappy? I should have done my homework first >_<

    No reason to change it the ModXstream PSU's are the better OCZ's unit I would just leave it alone. It wouldn't be the first PSU I would pick but it has plenty of power for your 2 5770's
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    May 8, 2010 6:07:04 AM

    If I buy a i7 860/ i5 750 with a HD 5850, how much power will i need? is 650W enough? what if i go for crossfire later..?
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    May 8, 2010 8:18:28 PM

    thunderclash said:
    If I buy a i7 860/ i5 750 with a HD 5850, how much power will i need? is 650W enough? what if i go for crossfire later..?


    A quality 650 watt unit like a Corsair, SeaSonic, or Antec will be more then plenty to run 2 5850's and will still leave you room to overclock. For a Single card a good 500 or 550 watt unit would be enough. Since you think you might want to crossfire get the 650 watt unit but please I cant stress this enough get a good quality unit the brands I listed are great companies and have great support too.
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    May 9, 2010 3:53:41 PM

    what about the geforce 6800 ultra pcie 512mb. i feel left out :( 
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