Occasional low performance & considering the frequency, I'd say it's more of an occasional high performance.
The maximum CPU speed is 2.20 GHz.
Most of the time, my computer becomes very slow and the CPU frequency goes up to no greater than 0.6~0.8 GHz. At other times, the frequency is 2.7~2.8 GHz (weird but makes me happy).
What could be the cause?
EDIT: I meant two things:
- The speed goes over the limit.
- It gets stuck in low frequency even when I require it to give more (by using several CPU extensive applications)
EDIT 2: It's a laptop with Intel Core i7-2670QM CPU @ 2.20GHz
EDIT 3: Thanks to David Schwartz, I know that:
The CPU will go over the maximum labeled speed under some conditions
Overheating might cause the CPU to NOT reach the needed speed
Although in my opinion it didn't get too hot. I'll observe the CPU's behavior for a while.