[QUOTE="swehunt"][QUOTE="eBusiness"]
It does seem like the GTX 580 cards tend to overstep their TDP in Furmark, exactly how much is impossible to tell from power socket measurements, but somewhere in the 260 to 280W range I'd guess from the numbers.
As for heat vs. power, it's basic physics, what goes in comes out. Noise and electromagnetic radiation wouldn't even amount to 1W, so for all practical matters the heat produced is equal to the power spent.
In any case, the PSU in question is rated 768W @ 12V, with up to 336W for each PCIe rail, even if the graphics cards does consume 600W it will still power the system just fine.
eBusiness
Besides, noone want their PSU to be running 80-90% of it's capacity, it'll be loud/hot and possible shorten it's lifespan by a significant way. SLI'ing thoose cards need a stronger PSU thats just how it is. Iv'e seen two people with SLI'ed gtx580 on hx850 witch actually were needed to replace to a better PSU because they ended up short on the wattage while OC'ing. According to Anadtech the second card added 351w, running a loss of 15% (witch is quite high for a PSU in a testrig but anyway = 351 x 0.85) we can find out how much the card actually draw itself, this means 298w on a card alone! So anyone with experience know leaving only 170w for a I7 CPU is not recomended, he WILL run outta juice if he want to OC that PC and with thoose two cards he needs to OC to get the most out of them, after a OC on thoose cards and on the CPU he will experience cutout's, imagine spending all that money and still not be able to play games!He'll only get that high by running Furmark, during normal gaming the cards won't exceed TPD, an i7 2600K is rated at 95 W, but actual use seems to be in the 50 to 60W range. Even with a good overclock it probably won't hit more than 100W. If you start messing with the video card clocks too I'd get worried, but dual GTX 580 is nothing more than what the PSU is made for.
Your not reading the text in front of you.1) TDP has little to do with the mamimum powerdraw, check my erlier post where i also linked to wikipedia where a kind soul have been writing what it actually does mean.
2) He have a i7 920 as of now that is a 130w *TDP (*witch isnt exsactly the same as powerdraw as explained already) CPU!, and he'll be OCing it. Can you explain about where you got the 2600k from?
3) The PSU was made before GTX580 ever were in productions, it could never be made for that purpose, and no it wasnt made to run over it's specifications at all.
Your argumenting for the kiks of it, why not helping the TC make a good desition instead.
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