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ax850 enough for 980x and 2 480s overclocked on water?

post #1 of 43
Thread Starter 
I was searching threads on this and some said a quality 850w was enough and some recommended a 1000W. The AX850 is on sale so I've been thinking about buying it but wanted to have enough headroom to overclock both gpus and cpu under water. What does everyone think? For not much more I could wait and get something like the ocz z1000m on sale which Phaedrus has previously recommended a while back as the best bang for buck in the 1000W category.

Please if you're suggesting alternatives that they are at least gold rated and quality supplies.

In case you're confused yes I have 460's right now, I'm planning to upgrade and think 2nd hand sli 480's are probably the best choice

>> in the case that the 850w isn't enough should I pony up the extra for an ax1200 if that would allow me to add a 3rd 480 or would I really need more than 1200?
Edited by stren - 4/19/11 at 8:23am
     
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post #2 of 43
I don't think so, though I did run two overclocked 470's and a overclocked 1090t on a HX850, but that was cutting it really close.
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post #3 of 43
I had SLI 480's and a overclocked i7 930 (4.2) and it barely cut it using a 850 watt PSU. The AX is a very good PSU, better then the one I was using so it should do it. I ended up getting a HX1000 for that pc just for piece of mind.
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post #4 of 43
The AX850 is enough for running your sig with the SLI 480's. My sig rig uses 850 watts from the wall while folding. So in reality the actual use is 90% of that. Keep in mind that I have 18 fans and dual pump wc setup. If going for a 3rd card get the AX1200.
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post #5 of 43
GTX480 is a 250w and draws a bit more in bench. ax850 can do 70a on 12v and usually does a bit more than its specs (though no recommend at full load). With sli scale, 980x at 4.3G and other components, it should make the cut but pretty close.
post #6 of 43
with the 480s overclocked it will be damn close, your system is pretty similar to mine cept the video cards and i can pull 835w at wall with mine. If going for 3 get the AX1200 (im getting a third 6970 myself and will get the AX1200)
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post #7 of 43
The 850 is perfectly fine for GTX 480 SLI.
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post #8 of 43
Quote:
Originally Posted by Blindsay View Post
with the 480s overclocked it will be damn close, your system is pretty similar to mine cept the video cards and i can pull 835w at wall with mine. If going for 3 get the AX1200 (im getting a third 6970 myself and will get the AX1200)
But the Power Supply will be pulling 700w.
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post #9 of 43
Quote:
Originally Posted by BradleyW View Post
But the Power Supply will be pulling 700w.
More like 725-750w and 480s can easily draw more than my 6970s especially overclocked
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post #10 of 43
Thread Starter 
Thanks all +rep, well I guess I need to decide what to do, after being on the edge for a while now it might be nice to know I have a bit of room, so I might wait and see what other deals come up. BTW the AX1200 has been out for a while right? Anyone know if a 2nd version is going to come out?
     
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