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2x GTX 580's on Seasonic X-650? - Page 2

post #11 of 14
would suggest atleast a 750 without any overclocking.
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Kiyu
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post #12 of 14
May be cutting it awfully close, but it could be manageable at stock?
post #13 of 14

Do it. the 2500K draws WAY less power then say an i7 920 or similar cpu. I am running it without issue and I dont even hit over 600 watts from the wall let alone from the power supply. Now when I overclock the cards i do go up in wattage substantially but still not over 650 watts from the power supply. Don't believe me? I made a video to prove my findings.


Thats me playing with 2 580s on my sig rig. You can subtract 50 watts from what you see because I also have my monitor and router hooked up to that meter. Don't run any furmark or overclock the cards and you'll be *WELL* within specs. 550 watt from the wall = 489 watts DC being output by your power supply.

I used BC2 because it is the game i see the highest load wattage from. Now when i overclock using 1100mv instead of the stock 1000 to 875mhz core/2200mem I see 700-750 watts from the wall using the same game. Still within the power supplies limits if you factor in 89% efficiency and subtract 50 watts for my monitor/router (i have measured them at exactly 50 watts).
Edited by djpheer - 10/12/11 at 9:22pm
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My System
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post #14 of 14
Quote:
Originally Posted by djpheer View Post
Do it. the 2500K draws WAY less power then say an i7 920 or similar cpu. I am running it without issue and I dont even hit over 600 watts from the wall let alone from the power supply. Now when I overclock the cards i do go up in wattage substantially but still not over 650 watts from the power supply. Don't believe me? I made a video to prove my findings.

http://www.youtube.com/watch?v=-RHqrGZQC8Y

Thats me playing with 2 580s on my sig rig. You can subtract 50 watts from what you see because I also have my monitor and router hooked up to that meter. Don't run any furmark or overclock the cards and you'll be *WELL* within specs. 550 watt from the wall = 489 watts DC being output by your power supply.

I used BC2 because it is the game i see the highest load wattage from. Now when i overclock using 1100mv instead of the stock 1000 to 875mhz core/2200mem I see 700-750 watts from the wall using the same game. Still within the power supplies limits if you factor in 89% efficiency and subtract 50 watts for my monitor/router (i have measured them at exactly 50 watts).
Well done sir. When you have time, please contribute to the power usage thread in my signature.

OP, also keep in mind that overclocking can have quite a big effect. Keep in mind that this was with full load (Prime and Furmark) which is not reasonable for real circumstances. Overclocking my 480 to 800Mhz at 1.075V from 700Mhz at 1.013V raised my max wattage almost 90W!

The 580's did fix most of the leakage problems the 480's were facing, so 580 power draw will be less. But something to keep in mind.
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Liquid
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