Hi,
I've got Sapphire HD7850, stock clocks are 860 and memory 1200mhz. I OC it to 1200 core and 1400 memory, voltage about 1.175 - 1.2, rise cooler speed and temp never reach more than 80 degrees. BF3, DOTA 2 and LoL haven't crash it. There are no artifacts, color changes. And when I exit game...