3870x2= O/C'd to 850/1050 from 825/901. I had to manually set the fan higher to keep temps down (Asus 3870x2 has lousy auto fan control I think its on purpose to keep noise down). My temps were actually pretty good, mostly staying under 70 degree celsius. With the fan at 35-40% up my idle temps are in the 40-50 degree range. However, I didn't keep the OC because I wasn't seeing a difference in games, they all play pefectly fine at stock speeds, so why stress the chip, except for running benches of course.