Hello I am going to upgrade my video card to a GTX 580 but I have been looking around to see what the needed PSU is to run it, I have found varied answers anywhere from 600W to 750W and while I know 750W will run it I want to make sure my current PSU is not able to run it before purchasing a new one. I will also possibly be upgrading my Monitor this week to a 24 inch HD Monitor. Any Suggestions are more then welcome if there is a better card out there for my money.

EVGA 015-P3-1580-AR GeForce GTX 580 (Fermi) 1536MB 384-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card

Monitor: ASUS VS248H-P Black 24" 2ms HDMI LED Backlight Widescreen LCD Monitor 250 cd/m2 ASCR 50,000,000:1

PSU (if needed):
CORSAIR Enthusiast Series TX850M 850W ATX12V v2.31 / EPS12V v2.92 80 PLUS BRONZE Certified Semi Modular High Performance Power Supply

APPROXIMATE PURCHASE DATE: Will be purchasing it this week.

BUDGET RANGE: $700 (will not be buying the monitor this month if I need a PSU)


CURRENT GPU AND POWER SUPPLY: ATI Radeon HD 5770 / RAIDMAX HYBRID 2 RX-630SS 630W ATX12V V2.2/ EPS12V SLI Ready CrossFire Ready Modular Power Supply, New Version with Build-in LED Fan On/Off Switch

GIGABYTE GA-H67M-D2-B3 LGA 1155 Intel H67 SATA 6Gb/s Micro ATX Intel Motherboard
Intel Core i5-2500 Sandy Bridge 3.3GHz (3.7GHz Turbo Boost) LGA 1155 95W Quad-Core Desktop Processor Intel HD Graphics 2000 BX80623I52500
CORSAIR XMS3 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Dual Channel Kit Desktop Memory Model TW3X4G1333C9
Thermaltake V3 Black Edition VL80001W2Z Black SECC / Plastic ATX Mid Tower Computer Case -- Running 2 extra fans and a heatsink on the CPU


PARTS PREFERENCES: No preference either way if ATI is better for my money I am more then willing to take suggestions

OVERCLOCKING: Maybe in the future but for now if I don't need to replace my PSU I would rather not.


MONITOR RESOLUTION: Currently running 1600x900. If I upgrade my monitor this week will be running it at 1920x1080
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  1. Best answer
    I use this site to calculate the wattage usage of a system - just plug & calculate

    Plugged in the specs you listed above & included 5 x 120mm fans & 2 stata hdds & your system will use 487watts with the gtx580

    I am not familiar with the Raidmax psu you have, but the customer reviews on Newegg have been really positive & you have the 2x 6+2 connectors to plug in the gtx 580. You should have no issues & good headroom with your current powersupply, unless someone else states otherwise that the Raidmax psu you have is horrible & ex. rated @ 500watts.
  2. I agree, the PSU you have should have enough juice to power your PC and leave a little headroom for more (but not much). If you plan to heavily OC the 580 or your cpu, you'll need a new PSU.

    However, if you're looking for a power efficient graphics card that can beat the 580 in head to head, consider the new nivida GTX 680 (aka Kepler architecture) cards. They consume, on average, about 50-100 watts less than the 580 (under load) and have enough horse power to beat the 580 in games like Crysis 2, The Witcher 2, Batman Arkham City, BFBC 2, and others. Mind you, all the cards out right now are reference design ones and they cost about $500 bucks (and they're kinda out of stock since they've just been released). But from what I've seen performance wise, it blows the GTX 580, the Radeon 6990, and the GTX 590 out of the water in terms of FPS per Watt. It even beats Radeon's newest 7000 series in FPS and power consumption (though not by much).

    If it's within your budget, I'd say consider them; otherwise your 630 watt PSU is capable of running the GTX 580 but it'd be even more capable of running the GTX 680.
  3. Thanks for the help and that site is just what I was looking for but I hadn't found one like it when I searched around, will keep it handy for next time I need to check things like this. Appreciate your help!

    I hadn't considered the GTX 680 because I was just trying to make sure my PSU could run the 580 at this point but if it can run the 680 then I will definitely see if I can afford it. Thanks for the suggestion and the help!
  4. Best answer selected by roloch.
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