By user12625760 on Feb 07, 2007
Powernow has not been working on my home server. It was fine as 2200Mhz or 1800Mhz or 1000Mhz but if it ever tried to run at 2000Mhz the system would crash so I have been pretty much doing power now by hand sticking to 2200Mhz when I am using the system or 1000Mhz when I am not, saving about 40Watts when it is quiet.
Recently ASUS released a new BIOS version for the M2NPV-VM motherboard I have and this has now fixed the problem so that powernow works perfectly. If you have this motherboard and an Athlon 3500+ CPU then upgrade to version BIOS 0705 and powernow will work. Well it does for me.