|It's possible that your processor is "throttling"either for power management reasons or because it is over heating.|
If you run a program like CPU burn, which would fully utilize the processor, you would see the reported speed pop back up to 2.94 if it is a energy saving thing.
Check your temperatures to make sure it hasn't reached any maximums set in the BIOS or any physical limits determined by the processor.
Free Computer Tips and more:http://RyanTAdams.com
Paid Tech Support: Black Diamond