Originally Posted by bamska
oh noo, i wanted to achieve 900core clock ... i guess i don't have golden cards. I do believe you about the 750w psu, it could handle everything just fine only if you're not overclocking. I have watercooled gtx480's and would like to squeeze the power out of them xD . So when i looked at some reviews/threads : some people saw a system draw of 1200w when oc'ing the gtx480 in sli... which is quite big.
You think my 1000w/80a/bronze can EASILY
handle a heavily oc'd pair of gtx480's ? Also, when oc'ing a cpu with its multiplier, does that make it more power hungry?
Thank you sir.
I would love to see proof of anyone drawing over 900 watts with a 480SLI system. The only way I can see that going anywhere near that would be if they have an SR-2 motherboard and two hex core processors. Honestly I don't even think you can feed a 480 enough power through a single 8 pin and a 6 pin power set up. To be frank I just flat out don't believe an SLI 480s system can pull that much. I've seen Quad-SLI pull that much but never anything remotely close to that from only two 480s.
So in conclusion to that your 1000 watt power supply should easily power this system.
Are you asking if it will be more power hungry if you overclock through the multiplier over overclocking through the baseclock? I would say no and even if it does it would be completely minuscule and negligible. The CPU itself is still running at the same frequency regardless of how you get there. A difference (less then 1 watt) could possibly result from the RAM. When you overclock the base clock your RAM changes as well since those are tied together. Depending on how much you overclock and the options you get for the RAM multiplier you may be forced to run the RAM slightly higher but even that difference would be less then 1 W.
I don't mean to be harsh with that first paragraph but in order for a SLI 480 system to pull over 1200 Watts they would each have to pull around 450 watts each which is way more then I've ever seen in reviews.