hackintosh 10.15.5 (i7 8550u) ./voltageshift power 40 44 not work

[jackxuechen]

My version of the system is 10.15.5 with hackintosh. cpu is i7 8550u. I tried using this site（https://sitechprog.blogspot.com/2017/06/voltageshift.html） to download the latest files（10.15 or above） and compile them myself from the master And the following command is executed

 sudo chown -R root:wheel VoltageShift.kext

I changed PL1 40 ./voltageshift power 40 44 Here is the log

------------------------------------------------------
   VoltageShift Info Tool
------------------------------------------------------
WRMSR 150 with value 0x8000001000000000
RDMSR 150 returns value 0xf3800000
CPU voltage offset: -100mv
WRMSR 150 with value 0x8000011000000000
RDMSR 150 returns value 0x0
GPU voltage offset: 0mv
WRMSR 150 with value 0x8000021000000000
RDMSR 150 returns value 0x0
CPU Cache voltage offset: 0mv
WRMSR 150 with value 0x8000031000000000
RDMSR 150 returns value 0x0
System Agency offset: 0mv
WRMSR 150 with value 0x8000041000000000
RDMSR 150 returns value 0x0
Analogy I/O: 0mv
WRMSR 150 with value 0x8000051000000000
OC mailbox cmd failed
RDMSR 150 returns value 0x500000000
Digital I/O: 0mv
CPU BaseFreq: 2000, CPU MaxFreq(1/2/4): 4000/4000/3700 (mhz)  PL1: 40W PL2: 44W
CPU Freq: 1.3ghz, Voltage: 0.6387v, Power:pkg 2.54w /core 0.47w,Temp: 47 c

Then I tested CineBench R20, but the PL1 was still the default 15W

./voltageshift mon
------------------------------------------------------
   VoltageShift Monitor Tool
------------------------------------------------------
    Ctl-C to Exit

WRMSR 150 with value 0x8000001000000000
RDMSR 150 returns value 0xf3800000
   CPU voltage offset: -100mv
WRMSR 150 with value 0x8000011000000000
RDMSR 150 returns value 0x0
   GPU voltage offset: 0mv
WRMSR 150 with value 0x8000021000000000
RDMSR 150 returns value 0x0
   CPU Cache voltage offset: 0mv
WRMSR 150 with value 0x8000031000000000
RDMSR 150 returns value 0x0
   System Agency offset: 0mv
WRMSR 150 with value 0x8000041000000000
RDMSR 150 returns value 0x0
   Analogy I/O: 0mv
WRMSR 150 with value 0x8000051000000000
OC mailbox cmd failed
RDMSR 150 returns value 0x500000000
   Digital I/O: 0mv

CPU BaseFreq: 2000, CPU MaxFreq(1/2/4): 4000/4000/3700 (mhz)  PL1: 40W PL2: 44W
CPU Freq: 2.3ghz, Voltage: 0.7941v, Power:pkg 14.23w /core 12.87w,Temp: 57 c^C
 quit? [y/n] y

[sicreative]

It seen that the PL1/2 have been changed successfully. However, your laptop BIOS may restricted the max power so the CPU is not able to boost up.

[jackxuechen]

@sicreative The same BIOS, in Win10 using XTU can change the voltage and PL1/2

[Applepi]

I am also having problems setting power higher than 65W on 8750h and I was able to change upper power limits in windows.