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powernow-k8 problem

DISCUSSION [email protected] 2 participants 2 messages Mar 4, 2005 – Mar 10, 2005

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Hello list,
i would like to ask if it`s workaround for powernow-k8 to be fuctional on AMD64 system with FSB >254Mhz. Any value bigger than 254 causing powernow-k8 module to refuse load with message "No such device". Changing only value FSB in bios to any value <=254 make powernow-k8 work fine again. My board is abit av8 and CPU is AMD64 3000+.

Thanx for help

Rene Petro

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Quoted 4 lines · On Fri, Mar 04, 2005 at 01:00:19PM +0100, [email protected] wrote:

Hello list,
i would like to ask if it`s workaround for powernow-k8 to be fuctional on AMD64 system with FSB >254Mhz. Any value bigger than 254 causing powernow-k8 module to refuse load with message "No such device". Changing only value FSB in bios to any value <=254 make powernow-k8 work fine again. My board is abit av8 and CPU is AMD64 3000+.

I don't know if such workaround exist but I know for sure you should change the PLL_LOCK_CONVERSION in the powernow_k8.h for stability reason if you try to make one, because the processor use a speical counter clocked by the system bus in order to prevent snoop when the PLL lock and therefore you should give it a good one since the current powernow_k8 driver is written with a fsb at 200MHz in mind. With a FSB to (say) 254 MHz, I would put something like that:

#define PLL_LOCK_CONVERSION 254

I guess a proper fix should be to do so by computing the system bus and then pass this value instead of using PLL_LOCK_CONVERSION since it seems there are more and more people that want to run their system with a custom fsb.

Paul, could you please give us some coments?

Cheers,

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Bruno Ducrot

--  Which is worse:  ignorance or apathy?
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