sean@cheddar ~ % dmesg | grep powernow
powernow-k8: Found 1 AMD Athlon 64 / Opteron processors (version 1.40.2)
powernow-k8:    0 : fid 0xa (1800 MHz), vid 0x6 (1400 mV)
powernow-k8:    1 : fid 0x2 (1000 MHz), vid 0x12 (1100 mV)