I use 32 bits Debian on the HP L2000 with Turion 64 so your mileage may vary with the 64 bit flavor. From memory all I needed was: apt-get install powernowd echo powernow-k8 >> /etc/modules echo cpufreq_userspace >> /etc/modules (reboot, or manually "modprobe" these modules) If you use Gnome there is a nice pannel applet that will monitor the CPU speed. The powernowd normally idles the CPU 800MHz and jumps it up to 2GHz when needed. -Brett.