4.8 game stable. 4.6 Prime stable. Both put max temps right around 70c with a Hyper 212+ with two fans. Have it running at 4.6 until the newness wears off. The 200mhz difference didn't seem to make a discernible difference in BlackOps, BC2, Civ IV, or F1 2010 . Picked up 5-10 fps in these games...