I've seen a billion threads like these already about people not seeing the right speed, so I thought I'd clear it up, also kill two birds with one stone by also explaining Cool and Quiet Technology
Explanation
Cool and Quiet and Speedstep are both power saving features used by AMD and Intel processors respectively, what they do is reduce the Heat and (possibly Loudness) by reducing the clock speeds when Idle by dropping the Voltage and the Multiplier
CPU's having Speedstep and Cool and Quiet Technology:
Intel:
Intel Celeron Dual-Core
Intel Core 2 Duo
Intel Core 2 Extreme
Intel Core 2 Quad
Intel Pentium D (just the Preslers)
Intel Pentium Dual-Core
AMD:
Athlon64
Athlon64 X2 FX
Athlon64 X2
Opteron
Phenom X3
Phenom X4
Disabling These Features Intel: you simply disable C1E and EIST in the BIOS
AMD: Disable CNQ in your BIOS (I need an accuracy check on this one)