I'm running a custom built with the CPU being an AMD FX-8350 with an OverClock to 4.333GHz, 16GB of Radeon Performance series DDR3 at 1866MHz, and the GPU being an ASUS R9280X-DC2T-3GD5 with an OverClock on the clock speed to 1110MHz as well as a voltage increase, the GDDR5 OverClocked to 6560MHz and I'm at a power target (and reaching said target) of 110%. I have not changed the thermal paste or altered the cooling in any way. I pulled an average of 68fps on ExtremeHD, while my second monitor was graphing GPU info via ASUS GPU Tweak.