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SpeedStep only has 2 steps, bottom and top

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I applied the SpeedStep patch for 10.7.3 and it works fine. However with MSRDumper I can see there are only 2 steps are used:


Feb 15 00:17:57 Zhangs-MacPro kernel[0]: MSRDumper CoreMulti(43)
Feb 15 00:17:57 Zhangs-MacPro kernel[0]: MSRDumper PStatesReached: 16 43
Feb 15 00:17:57 Zhangs-MacPro kernel[0]: MSRDumper CoreMulti(16)
Feb 15 00:17:57 Zhangs-MacPro kernel[0]: MSRDumper PStatesReached: 16 43




Also in the boot process I can see:

ACPI CPUs not found: C-States not generated !!!
ACPI CPUs not found: P-States not generated !!!


I know this is not a problem about SpeedStep patch. From what I've read I guess I need to put some SSDT.aml file or DSDT.aml file under /Extra. However I don't know how to get them...


Thanks for helping!

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This is posted in the wrong sub-forum, but I have the same problem. However, when I am in Windows, CPU-Z seems to jump between x19 and x43 as well (although other tools besides CPU-Z sometimes read inbetween). I do not use the speedstep patch, but chameleon outputs that it created p-states (and the SSDT I can extract while booted into OS X shows multiple p-sates), but the debugger will only show the minimum and maximum sates being used, even after an hour or so of running.

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I get the same, but it doesn't really bother me. I'm just glad to be able to use the max speed on my CPU.


I get 16 and 45 in Lion and Mt. Lion.

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