Hello!
I've overclocked one workstation with athlon 64 2800+ cpu and I was able
to get cool'n'quiet working in windows by
manually setting p-states with RMClock utility and i'm trying to achieve
same thing under linux kernel 2.6.38.
First I've modified DSDT;
multipliers are the same, since I'm not changing those, only FSB
frequency, which is now 260 Mhz with HT multiplier of 3, that gives:
780 + 2*130 = 1040
780 + 10*130 = 2080
I'm a bit confused though - fid multiplier is different under windows and
in bios - there it is used x9 which conforms with highest cpu frequency
reported
by various tools in windows:
2340 Mhz = 260 * 9 (it is actually running at 2342 - this is what various
tools say)
but I can't get it via traditional formula.
Booting vanilla kernel without modified DSDT will give me only 1
performance state with locked 2343 Mhz.
However setting highest pss in DSDT to 2343 (0x0927) as highest will lead
to non working cool'n'quiet:
----
Mar 30 18:24:02 kriko kernel: [ 14.162636] powernow-k8: Found 1 AMD
Athlon(tm) 64 Processor 2800+ (1 cpu cores) (version 2.20.00)
Mar 30 18:24:02 kriko kernel: [ 14.162683] powernow-k8: invalid freq
entries 1800000 kHz vs. 2343000 kHz
Mar 30 18:24:02 kriko kernel: [ 14.162685] powernow-k8: invalid freq
entries 1000000 kHz vs. 1040000 kHz
Mar 30 18:24:02 kriko kernel: [ 14.162691] [Firmware Bug]: powernow-k8:
invalid powernow_table
----
What the correct frequency this cpu is running if I set fsb to 260 Mhz so
the cpufreq driver will accept it?
Thanks
--
Kristjan Ugrin
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