Quick Guide to Generate a SSDT for CPU Power Management

[hackmefrancis]

CPU Ratio Info:
------------------------------------
CPU Low Frequency Mode.............: 800 MHz
CPU Maximum non-Turbo Frequency....: 3300 MHz
CPU Maximum Turbo Frequency........: 3700 MHz

WITHOUT using the generated SSDT.aml, I have a working power management. I can see my CPU drops to as low as 800 MHZ in Intel PowerGadget but cannot get my turbo speed 3700. I'm maxed at 3500 GHZ.

Using the generated SSDT.aml, I can reach 3.67 GHZ (it's the highest I'm seeing in PowerGadget) but my CPU lower states don't work. Lowest I get is 2.8 GHZ.

What could be wrong?

 

[iUserosx]

I'm getting the result attached below with only using clover patches also attached below.....can anyone kindly tell me is there any chances of getting better result using custom SSDT? Hardware details are in my signature.

 

[niclasc]

I'm getting the result attached below with only using clover patches also attached below.....can anyone kindly tell me is there any chances of getting better result using custom SSDT? Hardware details are in my signature.

I also had all P-states before using a SSDT-file. But I measured my power draw before and after a SSDT-file. And after SSDT-file my computer draws less at idle.

So I guess it does something.

 

[htc]

I'm getting the result attached below with only using clover patches also attached below.....can anyone kindly tell me is there any chances of getting better result using custom SSDT? Hardware details are in my signature.

I think Clover generates SSDT on fly, maybe we don't need to generate manually!!
I don't know maybe someone with some expertise can explain.

 

[RehabMan]

I think Clover generates SSDT on fly, maybe we don't need to generate manually!!
I don't know maybe someone with some expertise can explain.

Clover does not generate the Apple specific stuff (APSS, APSN, ACST, etc).

 

[rj985]

After generating the SSDT is it necessary to edit config.plist?

 

[krasicher]

Hello guys,
Here my output without DSDT. Can someone tell me that if is good or not having only P-states?
Please.

 

[brabrand]

Found a possible bug with the kext

when I run

cat /tmp/AppleIntelInfo.dat

multiple times, more P-states are added

List of last lines that shows after running the last command multiple times:

1. CPU P-States [ (8) 16 28 30 34 35 37 38 39 ] iGPU P-States [ (4) ]
2. CPU P-States [ 8 16 20 23 24 25 28 30 33 34 (35) 37 38 39 ] iGPU P-States [ (4) ]
3. CPU P-States [ (8) 12 15 16 20 21 22 23 24 25 26 28 29 30 33 34 35 37 38 39 ] iGPU P-States [ (4) ]
4. CPU P-States [ (8) 11 12 13 15 16 20 21 22 23 24 25 26 28 29 30 33 34 35 37 38 39 ] iGPU P-States [ (4) ]
5. CPU P-States [ (8) 11 12 13 15 16 20 21 22 23 24 25 26 28 29 30 33 34 35 37 38 39 ] iGPU P-States [ (4) ]

Why does this happen, and with does the P-state for my iGPU stay at 4?

my system is configured as a iMac 14,2 with a 4770k cpu, and ga-z87n-wifi as mobo.

I followed your guide but I'm kind of unsure of how the clover configuration needs to be. I've set SSDT/dropOEM and dropped the two tables: CpuPM and the other.

Look at this screenshot

doesn't look right when the machine is idling...

 

[jhansi]

Please any one tell me my result is right or wrong ..i thing its Not Going to Max turbo Frequency it stops at (28) ...

 

[RehabMan]

Please any one tell me my result is right or wrong ..i thing its Not Going to Max turbo Frequency it stops at (28) ...
View attachment 161412

Typical. Per Intel spec, top turbo states cannot be reached unless only using one core.