- Joined
- Aug 19, 2010
- Messages
- 40
- Motherboard
- Z77X-UD5H
- CPU
- 2700K
- Graphics
- GTX 670
It looks like the previous SSDT solution for speed stepping & power management problems when using sandy bridge and 10.7.4 are no longer working with 10.8
In my experience Z77X-UD5H with 2700K was working great in 10.7.4 with a 4.8 GHZ overclock & speed steping while using edited SSDT from MacMan's instructions and vanilla AICPM kext.
Once I upgraded to Mountain Lion the machine started to freeze aka give silent kernel panic. If I remove the overclock, it works fine, turbo states and speed step on stock frequencies.
I tried patching AICPU kext (as required by ASUS UEFI users) and various smbios profiles, this did not fix the issue.
But if I use NullCPU and turn off EIST in BIOS it works great, switching between 16 and 48 multiplier, this is a function of C1 option being eneabled in BIOS.
I tried patching AICPU kext (as required by ASUS UEFI users) and various smbios profiles, this did not fix the issue.
It looks like Mountain Lion AICPM has changed in such a way that it no longer works edited SSDT files that enable "very high multipliers" and EIST.
Please share your experience if you have 10.8 with a gigabyte mobo, overclocked sandy bridge cpu and working EIST.
In my experience Z77X-UD5H with 2700K was working great in 10.7.4 with a 4.8 GHZ overclock & speed steping while using edited SSDT from MacMan's instructions and vanilla AICPM kext.
Once I upgraded to Mountain Lion the machine started to freeze aka give silent kernel panic. If I remove the overclock, it works fine, turbo states and speed step on stock frequencies.
I tried patching AICPU kext (as required by ASUS UEFI users) and various smbios profiles, this did not fix the issue.
But if I use NullCPU and turn off EIST in BIOS it works great, switching between 16 and 48 multiplier, this is a function of C1 option being eneabled in BIOS.
I tried patching AICPU kext (as required by ASUS UEFI users) and various smbios profiles, this did not fix the issue.
It looks like Mountain Lion AICPM has changed in such a way that it no longer works edited SSDT files that enable "very high multipliers" and EIST.
Please share your experience if you have 10.8 with a gigabyte mobo, overclocked sandy bridge cpu and working EIST.