cpu frequency problem

[Aaron]

Aaron wrote:
> Victor Sterpu wrote:
>   
>> I use Ubuntu 8
>> I have a acer travelmate 5720 dual core 2.2Gh Intel.
>> When I do cat /proc/cpuinfo I se this:
>> ...
>> model name    : Intel(R) Core(TM)2 Duo CPU     T7500  @ 2.20GHz
>> stepping    : 11
>> cpu MHz        : 800.000
>> ...
>>
>> I did a test with lmbench and the cpu frequency is reported as
>> [MHZ: 2378 MHz, 0.4205 nanosec clock]
>>
>> What is the correct frequency?
>> Why this 2 values do not fit?
>>
>> Thank you.
>>
>>   
>>     
> When I do cat /proc/cpuinfo the following is displayed.
>
> model name	: Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
> stepping	: 11
> cpu MHz		: 1600.000
>
>
> This is because 2400Mhz is load speed and 1600Mhz is idle to save power 
> and reduce heat. You can turn off this feature in a lot of motherboards, 
> but there is no benefit from doing so.
>
>
>   
I would like to retract my last comment. It would seem that some 
applications are slowed down by this power saving feature in 8.04

When BOINC is running on all 4 cores the system still runs at 1.6 GHz 
instead of 2.4 Ghz. I think it is being cautious for Laptops to stop the 
possibility of over heating.

So your laptop is running at 800Mhz to save power and reduce heat. When 
you run a normal program or game your cpu should jump to its top rated 
speed of ~2.2GHz. If you are running BOINC and your laptop is otherwise 
idle then if its behaving the same as my desktop PC it will run at 800MHz.