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GTX480 SLI Question - Enough Power? - Page 2

post #11 of 22
Thread Starter 
Thanks again for the info. Theres some sweet deals on these 480's, under $300. So its hard to pass up.

Next step would be top put those bad boys on water.
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post #12 of 22
Thread Starter 
Quote:
Originally Posted by brettjv View Post
I concur ... You NEED the CPU running as fast as possible to feed those beasts. However, I'm not sure you can assume dual-SLI will only pull 1/2 of the draw of quad-SLI. I'm betting it's more like 2/3. There is 'the rest of the system' to be considered here.

Honestly, there's not really any good reason to OC 480's in SLI beyond what you can easily attain with a nice low voltage. Even bone stock, SLI 480's will chew up and spit out 99% of the games on the market, completely maxed out at 1920 resolution. Metro is about the only game that will challenge them, and to do so, you you have to max it completely out.

If I were doing this setup I'd max out my CPU, and put the cards at 1.050V and see what I could get out of them AFA an OC goes, and leave it at that. You shouldn't run into any PSU problems with the 480's at that voltage. And I wouldn't push the memory OC's much either, cause memory OC's are famous for heating up the card, which in turn will lower the efficiency/increase the wattage draw.
Yeah i keep my 920 oc'd at about 3.6-3.8 ish at stock voltages....even tho i have been able to keep stable at 4.2 with a modest v-bump.
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post #13 of 22
A stock GTX480 in games uses Avg ~250W CLICK HERE

I'm runing a OC'd GTX480 @ 840/1025MHz w/ 1075mV and Q9550 @ 4GHz on CM Real Power M620 ..

It has 43A = 516W on 12V+ rail..

Your Corsair TX850 V2 has 70A = 840W on 12V+ rail and it would be more than enough for an OC'd SLI GTX480 setup..

EDIT: And I forgot to mention that I have thrown everything on my CM Real power M620 from games,3DMark 11,Heaven,Furmark,OCCT PSU Stress Test (GPU + CPU Test combined) and it has passed..

CHEERS..
Edited by KingT - 7/31/11 at 12:35pm
     
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post #14 of 22
I'd just like to mention that I have the same PSU as you and ocd gtxc480 sli with no issue.
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post #15 of 22
Thread Starter 
Quote:
Originally Posted by clerick View Post
I'd just like to mention that I have the same PSU as you and ocd gtxc480 sli with no issue.
Thanks! That's good to know!
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post #16 of 22
I'm running 580 Lightnings on my AX850 with the CPU OC'd to 4.8GHz and the GPU's OC'd to 940MHz and I haven't run into any PSU issues. The 480's are more power hungry than the 580's though, right?
post #17 of 22
Quote:
Originally Posted by Majin SSJ Eric View Post
I'm running 580 Lightnings on my AX850 with the CPU OC'd to 4.8GHz and the GPU's OC'd to 940MHz and I haven't run into any PSU issues. The 480's are more power hungry than the 580's though, right?
They are but only about 15-25 watts more hungrier I belive.
     
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post #18 of 22
As you can see in my sig rig I'm running both 480s and CPU heavily overclocked on my 850w. Scooting along just fine.
 
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post #19 of 22
Thread Starter 
UPDATE: I was able to get a second matching Zotac 480 from a guy here on OCN slapped a Antec 620 on it and am really pleased with the SLI performance. I was also able to run them modestly OC'd to 800/1600/2100 with my CPU OC'd at 3.8ghz.

Pic:


Edited by Rage19420 - 9/14/11 at 11:53am
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post #20 of 22
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