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omqpewpew

Member

Registered: 2013-09-30

Posts: 11

cpufrequency and overclocking [solved]

Hi all,
i have a AMD Athlon(tm) II X4 640 Processor and a Arock N68C-S UCC Motherboard, which allows me to adjust the CPU frequency multiplier manually.
Currently i maxed it out to ~3,7GHz /core instead of 3.0GHz.

If i'm now whatching

 while true;do clear;cat /proc/cpuinfo |grep MHz ;sleep 1;done 

none of the 4 cores actually come above 3.0GHz.

cpupower frequency-info

is showing that i only can use  3.00 GHz, 2.30 GHz, 1.80 GHz, 800 MHz.

does this mean, that i'm locked to 3.00GHz even if i confiugure the hardware otherwise?
or is it just shown this "way"

thanks in advance

Last edited by omqpewpew (2013-11-02 14:35:07)

ryley

Member

Registered: 2013-06-24

Posts: 7

Re: cpufrequency and overclocking [solved]

I haven't used an AMD CPU in years, but if they now have anything similar to Intel's "Turbo" tech, you may have to place a significant load on one or more cores before it will hit it's maximum frequency. Polling it's frequency every second won't be enough to trigger any dynamic clock increases.

Unless it's like my old netbook...

omqpewpew

Member

Registered: 2013-09-30

Posts: 11

Re: cpufrequency and overclocking [solved]

Hi,
thanks for your reply

i force cpu load with

stress -c 1 &
stress -c 2 &
stress -c 3 &
stress -c 4 &

in a script.
htop also tells that all cores are maxed out, fan is also going crazy.

Everything stays at 3.00GHz

any more suggestions?

omqpewpew

Member

Registered: 2013-09-30

Posts: 11

Re: cpufrequency and overclocking [solved]

ok i fixed it,
i configured the L3-Cache allocation to "all cores".
but if i configure it to use BSP-Only, it does the job.

For people having similar behaviors, i did it to max out fps on WoW with wine, because its very very cpu hungry.
Even now i'm wondering why my GPU(with ddr5) is like snoozing and the CPU driving crazy.
Now the L3-Cache seems to work right, and the frequency matches what i had configured in the Bios.

as WoW is in need of L3 my fps now doubled from ~80 to about 160+

thanks for the suggestion