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ax850 enough for 980x and 2 480s overclocked on water? - Page 5

post #41 of 43
Quote:
Originally Posted by GameBoy View Post
Not quite sure if you're agreeing with me or not But I don't usually recommend Powersupplies based on the fact that it can only handle typical gaming load before getting close to or beyond its rated wattage.
I am agreeing to an extent. There is no point at all recommending a unit that's not capable of running everything at full load. However, a PSU which will be at or near full power when at full load is entirely fine in my opinion for machines that are not going to spend a significant portion of their lives at full load.
A gaming rig with dual 580s will run fine on a 750w, because the user will run benchies only rarely, if that same rig were 24/7 folding, I'd prefer an 850w because it will spend a lot of its' life at high draw.

Which all means the OP will be fine with his AX850 and two 480s unless he gets into folding or really seriously pushing his components to their limits.
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post #42 of 43
Thread Starter 
Quote:
Originally Posted by allikat View Post
I am agreeing to an extent. There is no point at all recommending a unit that's not capable of running everything at full load. However, a PSU which will be at or near full power when at full load is entirely fine in my opinion for machines that are not going to spend a significant portion of their lives at full load.
A gaming rig with dual 580s will run fine on a 750w, because the user will run benchies only rarely, if that same rig were 24/7 folding, I'd prefer an 850w because it will spend a lot of its' life at high draw.

Which all means the OP will be fine with his AX850 and two 480s unless he gets into folding or really seriously pushing his components to their limits.
Folding is always a possibility but I would probably be cpu only folding as I generally fold in linux and I found the CPU overhead prohibitive of running under wine vs running bigadv on it's own.

1500W+ at the wall for tri SLI 480s? Holy moly. I know you have the 250 too, but your overclocks aren't that high. That would be about 1250W-1300W at 85% efficiency. Yikes.
     
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post #43 of 43
Quote:
Originally Posted by stren View Post
Thanks and + rep! Unfortunately with ca tax and shipping it's more than the standard amazon price. Given that I can't afford the 480's yet I may wait for a better deal or a 2nd hand one (though I've yet to see a 2nd hand one). I was mainly asking now because the AX850 went on sale and I wanted to know if I should jump on it.

Thanks everyone I think I'll wait for the 1200 as I'm not sure that I won't want to go tri sli in future.
I, too, went back and forth on whether I should get the AX1200 or not as I was stepping up from two GTX 570's to two GTX 580's, all while running an HX-750. I have a watt meter right beside me and the measured differences between the 570's and 580's are not great at all while gaming at Surround resolutions - even with the 580's I have yet to see 700W be drawn from the wall. However, it's important to note that my 580's are at stock, while my 570's where overclocked to 800MHz on the core with a slight bump to 1.0V.

With all that said, I ultimately decided to buy the AX1200 in the end. The HX-750 would have had no problems running my system as is, but like you, I couldn't decide if I really wanted a third 580 in the future or not. Now having played around with my sig rig, I'm convinced that I will be going with the third 580 after all, and I'm glad to have the headroom to spare. On top of that, if I ever decide to dive back into more extreme overclocking, I don't want the PSU to be the limiting factor.

I'm sure many will disagree, but I think the peace of mind of never having to worry about power requirements with triple or quad GPU setups is worth the price premium paid for high end setups. And I know you've already decided, but the way I see it, if you can afford a $1000 CPU, you should always compliment it with high quality components - especially one as critical as a PSU.
     
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