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Got Watts?

post #1 of 13
Thread Starter 
I was wondering if my PSU has enough Watts for my current build?

My system seems to run at about 650-700w at load, but spikes to 750-800 at times and is at a steady 800w with Furmark Xtreme Burn.

The reason I am concerned is I just added a GTX 580, so I now have 2 GTX 580 OCed and 1 i7920 OCed on the PSU.

I have this http://www.newegg.com/Product/Produc...82E16817139010

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post #2 of 13
I normally recommend an 850W for a configuration like that. However--

How are you getting those wattage figures? Kill-a-Watt?
post #3 of 13
Thread Starter 
I bought a watt meter at the Loews Hardware store.


Edit: And if you think I need a new PSU, which would you recommend?
Edited by tconroy135 - 12/27/10 at 7:23am
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post #4 of 13
Quote:
Originally Posted by tconroy135 View Post
I bought a watt meter at the Loews Hardware store.
You have to factor in efficiency. 80%+ is expected with this PSU, so when it draws 800W, it uses ~650W for the actual system. The PSU is safe till it draws ~900W or so. Because 750W is not factoring in efficiency.

But, listen to Phaedrus, his advice will be more accurate.
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post #5 of 13
Thread Starter 
Also, I don't know if anyone would know or not, but later this week I will be removing the stock fans from my 580s and using Waterblocks, since my cooling loop is already running on the system will this decrease power consumption?
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post #6 of 13
Only slightly, you lose the drain from 2 small fans, and add a bit of load to your pump. Not a real drop in power.
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post #7 of 13
Is that 800W with one 580 or two?
post #8 of 13
Thread Starter 
Quote:
Originally Posted by Phaedrus2129 View Post
Is that 800W with one 580 or two?
That is with both of them, 2.
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post #9 of 13
Surprising. Have you tried it with the work around for the "Furmark power limiter"?
post #10 of 13
Thread Starter 
Quote:
Originally Posted by Phaedrus2129 View Post
Surprising. Have you tried it with the work around for the "Furmark power limiter"?
Oh no I haven't, I didn't realize Nvidia limited the power draw in Furmark...

but in the Metro 2033 Benchmark the meter reads anywhere from 600w-800w with both cards OCed at 1.1v core.
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