powernow-k8 problem
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
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? -- Don't know. Don't care.