@vitornob, nVidia & AMD recommends higher wattage than needed to cover some certain stuff no need to be explained. But the fact that a high end system with a single GTX 580 draws about 470W. and test systems showed a maximum of 700W consumed in full load.
But you're right about OCing, if the OP will do some extreme OCing then a 900W is the best choice
Agreed 100% with ur explanation. And I know that the recommended wattage is 'oversized' (through I would prefer that they cover not the PSU wattage, but the 12v rail PSU wattage, it would be more precise).
For some PRETTY intensive app (burn-in tests) I saw 777w power consumption from SLI GTX 580 stocked cards in a i7 920 @3,33ghz (anandtech)
- Maybe 60+ A in 12v rail (preferable in 1 rail only and 522W VGA SLI + 150W CPU) should do the trick?
Saying, just checked that the AX 850 can deliver 70A @12v, the AX850 SHOULD work fine so.. but even this way I would change the PSU for a bit beefier one, like ilysaml said, a 900w+ PSU (since it can deliver almost all the power in 12v)
Well I am fairly adament on a gold rated corsair psu which leaves me with the ax850 or the ax1200. newegg is sold out of the 1200 and its expensive and its way way way more than i need. Through my research I deduced that the 850 would be enough but that it would be very close which is why I came here. Some websites can be vague about their power consumption figures. Two 580's should eat up around 450w. I searched for the mobo and the processor and saw that the 2700k can eat up almost 300w when overclocked. I dont know if that was the mobo and cpu or just the cpu or mobo, cpu, and gpu. Just wanted to be sure. Think i'll go with the 850 and if its not enough (if the corsair h100 liquid cooler cant keep the 2700k below 80c at 5ghz) then i'll pay to restock it and get the 1200 when it comes back in stock.
1 GTX 580 eat 450W not 2, or you mean 450W for the GPUs only not the whole system.
Any high end CPU draws about 125-140W when overclocked, and thw 2700K is 32nm i guess it draws lower than that, not sure what you're saying.
If you want to objectively, accurately and scientifically determine what PSU power is required for your Vid card and PC in both watts and 12v rail amps., the forum Utility link below will show you how easy it is to calculate this information and objectively determine which PSUs are quality built, reliable PSUs that can meet your needs. Be advised that the available 12v rail amps. is just as important as the total PSU wattage. You need both to be correct.
The SBM $2k had i7-2600k + 2x580. You can see stock as well as OC power consumption. As well as cpu, gpu, or combined consumption. I believe these are off the socket readings so you have to take account of psu efficiency vs actual consumption.
Lovely psu but it's white. Everything in my case is black and blue
Aesthetics are extremely important to me
Brand is extremely important to me
Everything is Asus/Corsair. The only thing that isn't are the gpu's and the only reason I allowed the MSI's is because they still match, they're dual slot instead of triple slot, and they're 3gb.
I felt I should clarify that I will not be OC'ing the GPU's at all. The lightning XE's will be left at stock factory oc settings. Why get lightning xe's for a single monitor setup at all then? For the looks and for the epeen my friends. Also I play Total War Shogun 2 which is one of two games currently out that might benefit from a 3gb card. So in a year when the next TW title comes out, I will be loving myself.