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Antec quattro 850w PSU for 480 SLI

post #1 of 54
Thread Starter 
Hey guys need a little assistance, i wanted to know whether or not an antec 850w quattro will be able to run 2 480s.

The rig is a socket 775 with q6600 at 3.6ghz and 6gb of ddr2 ram. Watercooling with a couple of HDDs and optical drives and an ssd and a few fans.

I do understand that a corsair hx850 is capable of running 480s SLI so im just wondering how the antec fairs against the corsair hx850.

Thanks for the help guys. biggrin.gif

By the way would apppreciate the info as to why rather than just a yes it will work or no it won't. thumb.gif

EDIT:

I eventually tried it with the TPQ-850 and unfortunatly couldn't overclock that much, use to cut-off miday through 3dmark11, didn't bother trying furmark as we know it probably wouldn't have lasted a second. Maybe just maybe, a different higher quality 850 would have done it, but I would recommend something higher especially when your overclocking these 480's to the limit etc.
smile.gif
Edited by munaim1 - 9/23/11 at 7:07am
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post #2 of 54
My personal experience with the Antec Quattro 850w:

Worked great, UNTIL I added a second HD 5850 in Crossfire.

That second 5850 demanded a bit too much, and I lost a "rail".

I now run with a 1000w PC P&C Silencer Mk II.


Now Phaedrus can help with any and all PSU questions.
post #3 of 54
I think you'll get a mixture of Yes and No answers.

I say that it will work just fine as long as you don't overclock the 480s. Here's why:

Tom's Hardware was able to get their test system to pull 682W from the wall under full load when it had two GTX 480s in it (image). If I assume that the PSU was 85% efficient during this power draw, then that would mean the system pulled 579.7W from the power supply. However, I must add approximately 150W to this to account for the rest of the system because this power draw was achieved with Furmark.

So in other words, I think that as long as you don't overclock, then the most your system would ever pull from the PSU is about 730W, maybe 750W in extreme cases.
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post #4 of 54
For furmark bench test 480 SLI will consumption 850 watts of power. So if you are running furmark bench then you will need about 950 - 1k watt PSU.
http://www.anandtech.com/bench/Product/297?vs=308
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post #5 of 54
Quote:
Originally Posted by dixson01974;13825899 
For furmark bench test 480 SLI will consumption 850 watts of power. So if you are running furmark bench then you will need about 950 - 1k watt PSU.
http://www.anandtech.com/bench/Product/297?vs=308
Where do you see the power draw?

Edit: I found it.


Also, it's very likely that they measured the power draw at the wall. If they measured 850W at the wall, then that means the system pulled about 723W from the PSU.

Edit 2: I found it. It says "total system power in watts" which means that they measured 851W at the wall. If we assume that the PSU was 85% efficient during this power draw measurement at the wall, then that would mean the system pulled about 723W from the PSU.

Edit 3: That is in perfect alignment with what I said in my first reply to this thread: the system would pull about 730-750W from the PSU at the most.
Edited by TwoCables - 6/10/11 at 2:18pm
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post #6 of 54
Quote:
Originally Posted by dixson01974;13825899 
For furmark bench test 480 SLI will consumption 850 watts of power. So if you are running furmark bench then you will need about 950 - 1k watt PSU.
http://www.anandtech.com/bench/Product/297?vs=308

No, if they measured 850W at the wall that means the system was drawing ~722W from the PSU, which is well within what a TPQ-850 can handle.

So yes, a TPQ-850 can handle a pair of 480s pretty easily.
post #7 of 54
Quote:
Originally Posted by TwoCables;13825918 
Where do you see the power draw?

Edit: I found it.


Also, it's very likely that they measured the power draw at the wall. If they measured 850W at the wall, then that means the system pulled about 723W from the PSU.

Edit 2: I found it. It says "total system power in watts" which means that they measured 851W at the wall. If we assume that the PSU was 85% efficient during this power draw measurement at the wall, then that would mean the system pulled about 723W from the PSU.
Quote:
Originally Posted by Shub;13825922 
No, if they measured 850W at the wall that means the system was drawing ~722W from the PSU, which is well within what a TPQ-850 can handle.

So yes, a TPQ-850 can handle a pair of 480s pretty easily.

Plus his water cooling system + the cpu oc too?
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post #8 of 54
Quote:
Originally Posted by dixson01974;13825955 
Plus his water cooling system + the cpu oc too?
Yep! wink.gif
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post #9 of 54
Water cooling doesn't make a big difference in power consumption, and the overclock won't be a big deal either.
post #10 of 54
My only concern is overclocking the GTX 480s. When they're overclocked, they can consume a much larger amount of power and it can get ugly.
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