If you're on a super tight budget, hop on the sempron bus, if not then athlon is a better choice. I have an OC'd sempron 2400 (1.66ghz) running at 2.11ghz rock stable, probably could go to 2.3 or higher if I had an nforce2 board. Idles at 38c on stock cooler, 43c loaded. IMO, good chip for the price (got mine for 76$ CDN with tax).