Sandy Bridge Overclock HELP!

[DWJK]

Sandy Bridge SpeedStep HELP!

My system is using a Gigabyte X79UD3 + 3930k . I've had a stable build on 10.6.8 for a while but recently I noticed that my 4.5 GHz (multiplier) overclock wasn't showing up on 'About This Mac'; it would only display 3.8 GHz.

I've been scouring the internet for ways to get my overclock to work:

- Generating my own SSDT (and modding it to work with my DSDT) w/ revogirl's method
- Sandy bridge overclocked SSDT generated from OSX 10.7 Multibeast
- The above with(out) Generate C/P states and/or DropSSDT=Yes
- No DSDT
- Different SMBios'
- Different BIOS settings (Turbo on/off, 50/50/50/50/50/49 multipliers, C1)

Is it possible to overclock a Sandy Bridge processor on Snow Leopard? Could somebody point me in the right direction please?


EDIT: I was definitely barking up the wrong tree. I realized that the CPU was also being underreported in the BIOS. I was able to get past the 3.8 GHz limit by enabling EIST in my BIOS. My RAM speed was underclocked too; corrected it, not sure if this had anything to do with it.

I managed to boot into OS X once or twice, but during some experimental tweaking to test stability the boot hung on AppleIntelCPUPowerManagement. A quick google search revealed a patched AICPM and voila; Turbo + EIST + Patched AICPM = Overclock for SBe!

I do have a new question though: how does one go about enabled SpeedStep for my 3930k + X79UD3 combo?

 

[totenkopf4]

My system is using a Gigabyte X79UD3 + 3930k . I've had a stable build on 10.6.8 for a while but recently I noticed that my 4.5 GHz (multiplier) overclock wasn't showing up on 'About This Mac'; it would only display 3.8 GHz.

I've been scouring the internet for ways to get my overclock to work:

- Generating my own SSDT (and modding it to work with my DSDT) w/ revogirl's method
- Sandy bridge overclocked SSDT generated from OSX 10.7 Multibeast
- The above with(out) Generate C/P states and/or DropSSDT=Yes
- No DSDT
- Different SMBios'
- Different BIOS settings (Turbo on/off, 50/50/50/50/50/49 multipliers, C1)

Is it possible to overclock a Sandy Bridge processor on Snow Leopard? Could somebody point me in the right direction please?


EDIT: I was definitely barking up the wrong tree. I realized that the CPU was also being underreported in the BIOS. I was able to get past the 3.8 GHz limit by enabling EIST in my BIOS. My RAM speed was underclocked too; corrected it, not sure if this had anything to do with it.

I managed to boot into OS X once or twice, but during some experimental tweaking to test stability the boot hung on AppleIntelCPUPowerManagement. A quick google search revealed a patched AICPM and voila; Turbo + EIST + Patched AICPM = Overclock for SBe!

I do have a new question though: how does one go about enabled SpeedStep for my 3930k + X79UD3 combo?

DWJK

You may find some help here -
http://hints.macworld.com/article.php?story=20090309054944734

some comments here -
http://www.osx86.net/notebooks/19265-speedstep-turbo-boost-turn-hackintosh-mountain-lion.html

As Apple hasnt used these chips nor released any info on the new Mac Pro line - you may need to do it your self -

We have this link for P55 chips = http://tonymacx86.blogspot.com/2009/12/advanced-dsdt-fixes-enable-intel-native.html

One of the issues is that your hardware is greater than what the supported abilities are in the current settings for OSX 10.6 and MultiBeast,

lots of infomation here -
http://www.insanelymac.com/forum/topic/282084-what-is-speedstep-and-how-do-i-patch-it-etc/

this too....
http://code.google.com/p/xnu-speedstep/

 

[The Real Deal]

I used to have a Rampage III Extreme + i7 950 and 980X. Speedstep worked with Chameleon C and P states = Y

There was a software (10.6.8) limitation past 4,29/4,30 GHz




Now i have a Maximus V Formula + 2600K. Speedstep work with a patched BIOS and modded IOPlat...kext

I still got 10.6.8 on my setup AND the best part of it... i can go now beyond the 4,30 GHz wall. I have made some Geekbench passes with an overclock of 4,6/4,7 GHz.

Right now i write this lines 4,5 GHz. It's not reported in about this mac and Geekbench report the stock frequency : 3,4 GHz. Score is almost 17K, HWMonitor reports 100X45

I have tried to write the 4,5 GHz via the SMBios.plist but it mess Geekbench report as it show 305 MHz and about this Mac : 3,8 GHz



Speedstep + offset mode = win... X45 @ 1,32v at load ; X16 @ 0,94v in idle

 

[DWJK]

DWJK

You may find some help here -
http://hints.macworld.com/article.php?story=20090309054944734

some comments here -
http://www.osx86.net/notebooks/19265-speedstep-turbo-boost-turn-hackintosh-mountain-lion.html

As Apple hasnt used these chips nor released any info on the new Mac Pro line - you may need to do it your self -

We have this link for P55 chips = http://tonymacx86.blogspot.com/2009/12/advanced-dsdt-fixes-enable-intel-native.html

One of the issues is that your hardware is greater than what the supported abilities are in the current settings for OSX 10.6 and MultiBeast,

lots of infomation here -
http://www.insanelymac.com/forum/topic/282084-what-is-speedstep-and-how-do-i-patch-it-etc/

this too....
http://code.google.com/p/xnu-speedstep/

Thank you for the links totenkoph. I'm still throughly going over them but I'm getting the sense that this would be easier to accomplish in 10.7+. Is this true?

I'm using a custom DSDT + NullCPUPM + SleepEnabler. If I GenerateP & C states and DropSSDT I get kernel_task panics when I use geekbench. With these disabled, however, I have only one pstate, according to MSRDumper (under load).

Should I pursue native PM with this setup? My instincts say 'No'. Is this easier to accomplish L/ML?

EDIT: Just read this here: "…do NOT overclock with SpeedStep- it's known to cause performance decreases. Use with care!"

I guess that's that, isn't it?

EDIT 2: Correction; Geekbench KP will happen if Turbo Freq's aren't all set to the sample multiplier. Probably negates the point of having turbo in the first place, although I've read that for SBe overclocking Turbo mode is a requisite.

EDIT 3: KP happened with Turbo multipliers set to unity. Disabled Turbo mode and KPs seem to be gone for now. Geekbench score is a few 100 shy of 21k

EDIT 4: Started upping the multiplier and it seems like once it's past 45 (4.5GHz OC) my patched AICPM kernel panics while booting.

 

[totenkopf4]

Thank you for the links totenkoph. I'm still throughly going over them but I'm getting the sense that this would be easier to accomplish in 10.7+. Is this true?

I'm using a custom DSDT + NullCPUPM + SleepEnabler. If I GenerateP & C states and DropSSDT I get kernel_task panics when I use geekbench. With these disabled, however, I have only one pstate, according to MSRDumper (under load).

Should I pursue native PM with this setup? My instincts say 'No'. Is this easier to accomplish L/ML?

EDIT: Just read this here: "…do NOT overclock with SpeedStep- it's known to cause performance decreases. Use with care!"

I guess that's that, isn't it?

EDIT 2: Correction; Geekbench KP will happen if Turbo Freq's aren't all set to the sample multiplier. Probably negates the point of having turbo in the first place, although I've read that for SBe overclocking Turbo mode is a requisite.

EDIT 3: KP happened with Turbo multipliers set to unity. Disabled Turbo mode and KPs seem to be gone for now. Geekbench score is a few 100 shy of 21k

EDIT 4: Started upping the multiplier and it seems like once it's past 45 (4.5GHz OC) my patched AICPM kernel panics while booting.

DWJK

Some of the users have had luck w OSX SL and OC ing their hardware.
You should do a search for that - search field

Also in the old site we have a greater depth of OSX SL posts that in the new site - that you posted to - no one posts to the old one but you can read stuff etc,

http://legacy.tonymacx86.com

their is a section in the old site for optimization
http://legacy.tonymacx86.com/viewforum.php?f=48

should be one in the new site as well.

As for me if I want it to go faster I get out and Push....

 

[The Real Deal]

get rid of nullCPU.. it's incompatible with speedstep and decent geekbench score

 

[totenkopf4]

get rid of nullCPU.. it's incompatible with speedstep and decent geekbench score

The real deal

where is that your referencing -is this a kext - if so where located.