2630qm clock speeds

Ive noticed the clock speeds registering in cpu-z hover around 800mhz when its not doing anything, then when i run a cpu stress test like prime95, the cpu will jump up to 20 multipliers and then it registers as 1996mhz. its plugged into power, is there a reason its not jumping up again to 2.9gz as advertised?

 

I think it has to do with how many cores are active, I think the 2.9ghz might be for one core, then like 2.4ghz for two cores, and finally 2ghz for four cores?

Not totally sure but I think that is what intel's new processors do to save energy and reduce heat. While using only what you need at the time performance wise.

 

right but im running prime95 which is a cpu stress test and the highest the clock speed gets is 2ghz

 

It's a 2.0GHz CPU when all cores and threads are active. As stated 2.9GHz (Turbo Boost) is only activated when less than 4 cores/threads are active, specifically, that speed is when a program is only single core. Try looking at Task Manager to see how many threads are being used when you stress test it. Most likely, you have not set the affinity to a specific processor and it's distributing the load across all cores.

 

When you run the test, make sure the number of threads selected is set to 1 or 2. If you did not change this then it would have defaulted to 8 threads thereby limiting the frequency to 2 Ghz.

 

cool thanks guys ill try that

edit: ooo ok i set it to 2 threads and its sitting at 2.6ghz with spikes up to 2.8ghz (which is what most 2630qmz are advertised at)

thats close enough for me, i was just confused how the turbo step worked

thanks guys