Today I got my Athlon XP 2800+ (2083MHz, 166x12.5) up to an Athlon XP 3200+ (2200MHz, 200x11), using the dipswitches on my motherboard to bring down the multiplier. I was also running on stock VCore and stock heatsink/fan.
My idle temps are around 55C, and load is around 65 (nice and toasty, you know?) I do have a Volcano 11+ heatsink/fan combo which I wanted to put on, but unfortunately there were capicators in the way, which forced me to put back on the stock heatsink.
It was quite intense, I was working up a sweat hoping for Windows to boot, which it did. Just fine.