ubuntu 14.04 didn't detect my overclocking intel e7200 cpu
 

hi all

i overclocked my intel E7200 no ECS G31T-M from 2.53GHz to 3.0 GHz

when i run command :
watch "cat /proc/cpuinfo | grep -i 'cpu mhz'"
the result shows ubuntu didn't detect the overclocking CPU, the frequency keeping on 2.53 GHz

i only change external clock from 266 to 300.

BTW , my motherboard actually is ECS G31T-M2 , its original BOIS version didn't support to overclock , after i upgrade its Bios to ECS G31T-M so that i can change the frequency.

any step do i miss?
why ubuntu didn't detect the overclocking cpu?

Is the CPU one that can dynamically scale its speed? If so then that will be the current speed of the cores rather than the maximum speed. On my system I see 1400.000 when the maximum speed my cores will go is 3.2GHz. I'm running an AMD CPU but the same applies to all speed-stepping CPUs as far as I'm aware -- I know it did with the Atom in my EEEPC also.

yes, it can dynamically scale, the minimum and maximum speed is 800 MHz and 2530 MHz. obviously , 2530 MHz is exactly its default frequency, that is why i suspicion i miss steps.

You could try loading it with something like mprime and/or using something like conky or other real-time monitor to show the speed rather than trying to confirm it with a snapshot.

actually , command 'watch' can do monitor somethings.

Please provide the complete output of , once under load (mprime or compile a kernel with -j3) and once when the system is idling.

Please use code-tags for posting that output.

Test some item that is cpu intensive on the two settings. Does it work faster in one or the other?

why would you want these two data ?

I think there is a misunderstanding here. What exactly is it you want to know gbcbooks and what have you tried?

i want to overclock my Intel CPU E7200 which default frequency is 2.53 GHz on my ECS G31T-M motherboard (actually its a ECS G31T-M2 , i upgrade it to G31T-M),.

after i change its external frequency from 266 to 300, basic on upon steps , its maximum basic frequency should be 3.0 GHz

unfortunately, i saw its maximum baisc frequency did not change , it keeps on 2.53 GHz when i run command :
to monitor its detail info.

i try to figure out if there is any step i missed to activate these overclocking setting on Ubuntu 14.04.

So you say. But when I suggest that the CPU may be scaling so you monitor the CPU in real time you report you know that and how to do it. When TobiSGD suggests a test to confirm whether your CPU is overclocked you ask why. What we are both suggesting is that on available evidence you CPU has been overslocked but you're not seeing it as it's not scalling up. We are suggesting ways to confirm this.

To see how your CPU behaves in this two situations, which possibly gives us a hint what is happening. When you are at it already please also provide the core temperatures in both situations.

do you think
[CODE]cat /proc/cpuinfo[CODE]
can see the speed of cpu in real time ?

i think Bios can tell us if the cpu overclocked or not.
do you agree ?

ok, i think i can take a screenshot tonight.

hi i got some information when i run mprime95 ,see it as the screenshot.
Attachment 16134

the cpu speed goes to 2842.89 Mhz , that is total difference with shows.

does it mean we can not be tell the speed of cpu in real-time by [CODE]cat /proc/cpuinfo[CODE]?