Yeah all I've seen so far is that when I'm not doing anything besides web browsing, it lowers the core multiplier a lot. Whenever the CPU is being used, the multiplier is at 21x. I still can't believe how well it's running, totally stable with literally no increase in temps so far. I think I'll push it a little harder later on, but for now I want to see what this GTX 285 can do.
My last experience with overclocking was with an Athlon 64, which was generally unsuccessful with even mild overclocks yielding very high temperatures. Granted I have a better air cooler now but I wasn't expecting it to be so easy this time around.
Would it be a good idea to do a Prime95 "burn-in" overnight? I've heard that helps improve long-term stability.