Thanks for reply. Perfectly stable after few days now, anyway. Can't believe how much quieter the fans are. Worth doing just for that, and if I get a bit more battery life then that'll be a bonus, but haven't done any comparisons yet. Hope more people can benefit from this workaround, it deserves to...

Just registered to say thanks to Jan Kivar for an excellent article. I decided to have a go with CrystalCPUID and it payed great dividends in terms of reduced heat and fan noise. I am using a laptop, Aspire 1362WLMi, AMD Sempron 2800+ (SMN2800BIX3AY). The default Cool 'n' Quiet steps were 800MHz @ 0...