Sapphire 5830 Extreme. Usually run the fan a lot lower but I was playing. This is stable 24/7/2 months now. Hash goes from what is seen in screenie at 97% GPU load up to 380.3 when it peaks at 99%. It will ramp up to 1040 stable at this voltage but the amperage on the 1.156v goes up to 95+ and hash only jumps another few points.  For those that can't add the amps, volts, etc. I noticed one guy above noted the 90+ amp and said something about PSU exploding. hehe, yeppers it sure would. But, you are not drawing those amps from PSU. The vregs(VRMs) on the card drop the 12v down to the 1.156, in my case, @ 84a which = 97.104 watt(not counting slot draw of course). This is only ~7.92 AMP draw on the PSU at 12.25V. Add to that a very high end PC Power and Cooling MK II 950 Silver Cert(one that we need a new cert above the 80 + for since its 88% at the temps I'm keeping it. *shrug*) and you're gold. literally. This is card 3 of 4 in this rig. Just happened to be the one up at the time when i decided to snap a shot. All cards pull the same numbers within 1Mhash of each other. The other key is custom cooling layouts for the cards. The thermal compund has been replaced on all with ceramique II and additional air is forced from back of cards through custom made housings for each card. I played around a lot with the dimensions and fan layouts, intake locations, etc of the enclosures until I got what seemed like the best temps with the least amount of added amps for air flow..

  And to anyone posting crap about elec cost, etc. Bugger off or post some pics. that is what the topic is about after all, isn't it?