Just wanted to mention that my 650/600 is rock solid stable. I've played a few hours each of WoW, C&C:generals, WC3, and
HL2:ep1. And although atitool finds artifacts, I haven't seen anything in-game yet. So try some in-game testing before you panic.
My next bad idea is to open it up and arctic silver all the heat sinks. This cooled my old inspiron 8500 by a good 10 degrees celcius.
Then, does anyone know of an overclocking method for the duo cpu? I searched the forum for a pin mod and didn't see anything for us.