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Recommended psu for i7 2600k

Hello,
Im trying to figure out how much power I need for a computer that im potentially going to build. I will be using this computer for gaming and overclocking

The specs are as follows:

Intel i7 2600k 3.40ghz
Asus Sabertooth P67 motherboard
Corsair 6gb triple channel Ram
ATI Radeon HD 6970
1 TB Hitachi Hard Drive
OCZ 60gb Solid State Drive
ThermalTake Big Water 760i Liquid cooling kit

I was planning on purchasing a 650watt power supply but im not sure. please help :/
14 answers Last reply Best Answer
More about recommended 2600k
  1. SeaSonic X750 Gold
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817151087

    Would give you a decent about of room to overclock.

    But if you plan to upgrade later with crossfire and over clock that. I would say

    SeaSonic X Series X-850
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817151102


    Is the PSU with the right amount of headroom if you want to overclock with crossfire later down the line.
  2. 650w would be cutting it a bit close. It would probably run (due to the fact that the 2600K uses minimal power, even at OC), but it's not preferable to take so much power from your PSU. I'd recommend a more powerful PSU, like:

    Gigabyte ODIN 720W (still a bit small, but OK)
    Corsair TX750W
    Huntkey X7 900W (great for future upgrades/OC, and provides a modular cabling system)

    These are all good PSU's, and any one of them would be a decent choice made.

    Pick wisely, young liboiluvsps2, and be with you, the power will... :D
  3. Right ^^ A branded 750 or + psu.
  4. All the reviews I've seen is stock i5 2600k only requires about 70W load.

    Why would you need a 750W PSU to run liboiluvsp2's system? A 450W supply would easily suffice.
  5. Best answer
    A triple channel RAM kit won't help out your Sandy Bridge CPU, which only supports dual channel. If you already have the triple channel kit, just buy another stick of that same type of RAM with the same timings and voltage. That way you'll have 8GB filling all four RAM slots.

    Speaking of voltage, for maximum compatibility stick with 1.5v spec RAM kits.

    Most quality power supplies are at their most efficient when they are at 50% load or more. As long as your peak system power need is lower than the peak power output of the power supply, you'll be fine. During benchmarking at this site, overclocked Sandy Bridge systems were peaking in the low 400s for wattage with the average being around 170W. I don't know for sure how much wattage that liquid cooling unit will need, but I wouldn't think it would use more than 100W or so.

    I'd go with the SeaSonic X-Series 750W recommended by Randomacts. It's an excellent quality unit. I bought the 560W X-Series for my Sandy Bridge overclock/game system, but I don't have a liquid-cooling system, and I know I won't do SLI/CF.

    My system:
    Intel Core i5-2500K processor
    Intel stock cooler (had a Prolimatech Megahalems Rev.B but its bracket shorted against the case's mainboard tray)
    Gelid GC-Extreme thermal compound
    ASRock P67 Pro3 mainboard
    G.Skill Ripjaws X 12GB DDR3-1600 CL9 memory (one 8GB kit and one 4GB kit, all four slots full)
    Palit GTX 570 Sonic 1280MB video card
    Samsung Spinpoint F3 1TB SATA hard drive
    Samsung SH-223C SATA DVD burner
    SeaSonic X-Series SS-560KM 560W power supply
    Cooler Master HAF 912 case w/ six Scythe S-FLEX SFF21F fans
  6. You need to consider the power usage vs. efficiency of the system. As a result a 450W would run, but wouldn't leave any overhead, which would be quite damage for the PSU. I wouldn't really want to get above 80% usage, but each to his own.

    However I do think a 650W will suffice, a 750W will give you some more headroom, possibly even enough for a future upgrade to x-fire with a lower end card (but you'd really want an 850W for that). It just doesn't seem needed to me, even with OCing, a well made 650W will be fine.
  7. doive1231 said:
    All the reviews I've seen is stock i5 2600k only requires about 70W load.

    Why would you need a 750W PSU to run liboiluvsp2's system? A 450W supply would easily suffice.


    Where did you see a i5-2600K review?? LOL

    450w? Seriously, not with a 6970 and a overclock dude. I'd recommend a 620w for a single HD6970.

    Oh and you don't want a triple channel ram kit, only a dual channel.
  8. Toxxyc said:
    650w would be cutting it a bit close. It would probably run (due to the fact that the 2600K uses minimal power, even at OC), but it's not preferable to take so much power from your PSU. I'd recommend a more powerful PSU, like:

    Gigabyte ODIN 720W (still a bit small, but OK)
    Corsair TX750W
    Huntkey X7 900W (great for future upgrades/OC, and provides a modular cabling system)

    These are all good PSU's, and any one of them would be a decent choice made.

    Pick wisely, young liboiluvsps2, and be with you, the power will... :D



    WOW thanks alot guys I greatly appreciate it. Im new to forums so im still getting used to it.
    and Toxxyc haha thanks alot but now my hopes in getting the new Sandy Bridge i7 has been compromised now that intel discovered an error in P67 motherboards :/

    What would be a great replacement for this i7? Around the same price.
    or should I wait until they release the fixed i7?
  9. Leaps-from-Shadows said:
    A triple channel RAM kit won't help out your Sandy Bridge CPU, which only supports dual channel. If you already have the triple channel kit, just buy another stick of that same type of RAM with the same timings and voltage. That way you'll have 8GB filling all four RAM slots.

    Speaking of voltage, for maximum compatibility stick with 1.5v spec RAM kits.

    Most quality power supplies are at their most efficient when they are at 50% load or more. As long as your peak system power need is lower than the peak power output of the power supply, you'll be fine. During benchmarking at this site, overclocked Sandy Bridge systems were peaking in the low 400s for wattage with the average being around 170W. I don't know for sure how much wattage that liquid cooling unit will need, but I wouldn't think it would use more than 100W or so.

    I'd go with the SeaSonic X-Series 750W recommended by Randomacts. It's an excellent quality unit. I bought the 560W X-Series for my Sandy Bridge overclock/game system, but I don't have a liquid-cooling system, and I know I won't do SLI/CF.

    My system:
    Intel Core i5-2500K processor
    Intel stock cooler (had a Prolimatech Megahalems Rev.B but its bracket shorted against the case's mainboard tray)
    Gelid GC-Extreme thermal compound
    ASRock P67 Pro3 mainboard
    G.Skill Ripjaws X 12GB DDR3-1600 CL9 memory (one 8GB kit and one 4GB kit, all four slots full)
    Palit GTX 570 Sonic 1280MB video card
    Samsung Spinpoint F3 1TB SATA hard drive
    Samsung SH-223C SATA DVD burner
    SeaSonic X-Series SS-560KM 560W power supply
    Cooler Master HAF 912 case w/ six Scythe S-FLEX SFF21F fans



    Really? wow I didnt know that.
    How did you find this out? I figured that new i7s would be compatible with triple channel.
    Also, getting dual channel 8gb ram would be cheaper than triple channel i assume but now i have to decide on another i7 since they temporarily discontinued sandy bridge mother boards due to their error with the P67 chip set.
  10. Or should I look toward an i5?
  11. Best answer selected by liboiluvsps2.
  12. liboiluvsps2 said:
    Best answer selected by liboiluvsps2.

    n
    nNothing wrong with the i7 so why not get what you want. I had the bigwater kit. Keep in mind it's really only good for a single CPU and its performance degrades after being turned on due to the heat all being trapped inside the case with the small radiator. If you plan to up voltages such as overclock, look into better cooling. Best of luck.
  13. My Killawatt meter showed almost 500 watts with a 5ghz 2600K and two GTX 560s under 3dMark. 350 watts stressing just the CPU.

    A whole lot better than my i7 930.

    I'm on a 750 watt PS.
  14. I run a i7-2600K oc to 4.7. 2 GTX570's oc'ed, and 8gb RAM. H70 cooler and a couple hdd and 2 ssd. My computer at the wall when folding BIGADV and both GPU's is 590W (not corrected for PSU loss). So do the math. I have it on a HX 850 Corsair PSU and it runs flawlessly! Still leaves room for one more GTX 570.
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