Some questions about SSDT and overclock

[Baoren]

Ok, I read several times most of the posts about SSDT since 10.7.4 came out.
I am not an expert so I have some questions about it and about overclock.

First of all, my hardware: as said in my profile, I own a ga-p67a-ud4-b3 motherboard, with a 2600k overclocked at 4,2 Ghz. My graphic card is a EVGA gtx 560 ti with 2gb ram. System Definition iMac 12,2

1) I installed 10.7.4 on my experimental HD. All went ok. I installed via multibeast the ssdt for 2600k overclocked. Result: I jump from 1600 to 4200.
Now, to go to the question, I am thinking to produce my own ssdt, extracting it from windows, but did I understand right that there are some problems with system definition iMac 12,2? I could change it to MacPro 3,1, but then (again, correct me if I am wrong) AGPM.kext wouldn't be load, and my graphic card could work worse and maybe cause some freezes. If I understand, MacPro 4,1 and 5,1 system definitions have similar problems with 10.7.4, so no point to change system definition this way.

2) My 10.7.3 system works great: not a single problem. If I edit correctly a good ssdt for my motherboard, and if it works with a good system definition for my graphic card, will my 10.7.4 work well as well? What I would like to understand is if I can reach the same stability in 10.7.4 with a good ssdt.

3) About overclock. I always overclocked changing just the base multiplier to 42. Should I change also the turbo multipliers? if so, in which way? could this affect the ssdt generated from windows?

thanks in advance for any tip

 

[Adam1203]

See my post, apparently Gigabyte boards have limited PStates (min/max) when using the iMac 12,1 and 12,2 SMBios plists.

viewtopic.php?f=295&t=61318&p=382823#p382823

 

[Baoren]

Thanks for reply! I'll check if macimini 5,3 system definition supports agpm.kext.
Anyway, if Mountain Lion has not such kind of issues, I am considering to skip 10.7.4.

 

[Adam1203]

Thanks for reply! I'll check if macimini 5,3 system definition supports agpm.kext.
Anyway, if Mountain Lion has not such kind of issues, I am considering to skip 10.7.4.

I was able to eventually get 5,1 to work too. So maybe try both.

 

[octavecode]

viewtopic.php?f=14&t=34583&p=217384#p217384
read 2) If you want vanilla speedstep you have 2 options

 

[Baoren]

http://www.tonymacx86.com/viewtopic.php?f=14&t=34583&p=217384#p217384
read 2) If you want vanilla speedstep you have 2 options

thanks. Have to say that I didn't understand everything from your post. It is clear, but my knowledge in such things is not so deep. Anyway, I will do some research, and will try your suggestion.
I have just a question, are there patched bios also for gigabyte motherboards? never heard about them. Anyway if there aren't I'll try the other way.

I think I'll stay on 10.7.3 anyway, but I'll do all these experiments on my experimental hd. If I reach a stable system I'll jump to 10.7.4.

 

[Adam1203]

http://www.tonymacx86.com/viewtopic.php?f=14&t=34583&p=217384#p217384
read 2) If you want vanilla speedstep you have 2 options

thanks. Have to say that I didn't understand everything from your post. It is clear, but my knowledge in such things is not so deep. Anyway, I will do some research, and will try your suggestion.
I have just a question, are there patched bios also for gigabyte motherboards? never heard about them. Anyway if there aren't I'll try the other way.

I think I'll stay on 10.7.3 anyway, but I'll do all these experiments on my experimental hd. If I reach a stable system I'll jump to 10.7.4.

I honestly think it is your SMBIOS, if you want, PM me your SSDT and I can take a look at it for you.

 

[Baoren]

I honestly think it is your SMBIOS, if you want, PM me your SSDT and I can take a look at it for you.

thanks! really appreciated. I'll try in the next days to edit my ssdt properly and then I'll send it to you. Just I can't till saturday, to much work :S I'll try to give it a look during next nights.

Anyway, thanks in advance

 

[octavecode]

http://www.tonymacx86.com/viewtopic.php?f=14&t=34583&p=217384#p217384
read 2) If you want vanilla speedstep you have 2 options

thanks. Have to say that I didn't understand everything from your post. It is clear, but my knowledge in such things is not so deep. Anyway, I will do some research, and will try your suggestion.
I have just a question, are there patched bios also for gigabyte motherboards? never heard about them. Anyway if there aren't I'll try the other way.

I think I'll stay on 10.7.3 anyway, but I'll do all these experiments on my experimental hd. If I reach a stable system I'll jump to 10.7.4.

Do you guys if Mountain Lion needs similar measures?

You do NOT need any pathced bios for gigabyte boards all you need is a proper DSDT and SSDT for your cpu plus the little guide in my post to get more than 2 pstates.
p.s first try to get a successful speedstep with a stock cpu and the work on you overclock.

 

[Baoren]

http://www.tonymacx86.com/viewtopic.php?f=14&t=34583&p=217384#p217384
read 2) If you want vanilla speedstep you have 2 options

thanks. Have to say that I didn't understand everything from your post. It is clear, but my knowledge in such things is not so deep. Anyway, I will do some research, and will try your suggestion.
I have just a question, are there patched bios also for gigabyte motherboards? never heard about them. Anyway if there aren't I'll try the other way.

I think I'll stay on 10.7.3 anyway, but I'll do all these experiments on my experimental hd. If I reach a stable system I'll jump to 10.7.4.

Do you guys if Mountain Lion needs similar measures?

You do NOT need any pathced bios for gigabyte boards all you need is a proper DSDT and SSDT for your cpu plus the little guide in my post to get more than 2 pstates.
p.s first try to get a successful speedstep with a stock cpu and the work on you overclock.

good suggestion, I'll try this way. 1st a stable system with no overclock, and then work on overclock.