Running Vista build 5536 on an Athlon 64, even when (for whatever reason) my
CPU usage is pegged at 100%, the Reliability and Performance Monitor reports
that the CPU is running at 50% Maximum Frequency.
On Win XP on the same system, AMD's dashboard software shows that that
during heavy CPU usage, the processor runs at full speed, and at all other
times runs at half speed. But the dashboard software doesn't run on Vista,
so I can't use it to see whether the processor is really running at full
speed despite what Vista's Reliability and Performance Monitor says.