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GTX480 SLI on 750 w PSU ? - Page 2

post #11 of 38
Quote:
Originally Posted by Phaedrus2129 View Post
I usually recommend an 850W.
theres your answer
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post #12 of 38
Quote:
Originally Posted by taintedmind View Post
Heh, I didn't even dare to run 2 GTX460s on 750W.
That was a mistake though. 750W is more than enough to handle a couple of puny GTX 460s.
post #13 of 38
No, Its not close at all, I had to replace my old 1000w PSU with a new one to run 2 gtx 480's overclocked. So 750 isnt going to happen.
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post #14 of 38
Thread Starter 
Meh.. i was going to give it a try but now im scared
(its so tempting though)
Thx for the replies
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post #15 of 38
Im sure at stock clocks they should work fine. You can even undervolt them at stock clocks to save some more watts. If you are into overclocking though I would recommend getting a stronger psu.
Edited by skatpex99 - 2/17/11 at 9:15am
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post #16 of 38
750 will run it. The peak draw shown on Lunchbox's rig is 880w, assuming 80+ silver at 85% efficiency that comes to 748w. It will work, but you will be at maximum power in gpu heavy stuff. Furmark would kill it, and kombuster will start fires.
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post #17 of 38
There's little reason to be scared to try it... if your computer is drawing too much power from your PSU, the PSU will shut down harmlessly. Then you know you need to do something about it, either get a better PSU or decrease your computer's power consumption somehow.
A normal gaming load from a couple of GTX 480s will be around 450-500W, and around 600W in Furmark. So just avoid Furmark and you should be fine.

The only caveat is that the TX750 you have delivers some pretty high ripple at high loads. It's in spec but it's not great either.
post #18 of 38
i was told the real power consumtion of a i7 rig with 580 sli is 777w under load, so GTX 480s use a fair bit more power... so im gona say no
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post #19 of 38
Quote:
Originally Posted by Phaedrus2129 View Post
I usually recommend an 850W.
No but seriously guys..Phaedrus has spoken...
/thread
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post #20 of 38
Look, if your using a good PSU that has OCP protection that works the worst that can happen would be your computer would be unstable. I would put the i7 back to stock clocks and try it out. If it doesn't work, then buy a new PSU.
     
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