hello! i have the following HP laptop: Notebook HP NX6125 (PY421EA), AMD Sempron 3100+,TFT 15", 512 MB, DVD+RW dual, HDD 60 GB, wireless, bluetooth, Windows XP Home though the processor should work on 1.8ghz it only works on 789mHz. when i change the option in bios, and disable amd power now technology, the processor works at 1.8ghz as it should. could anyone explain that option to me, what it does, how it works and should i have it enabled or disabled. thanks!