SOLVED AMD RX580 Low performance on big sur

[insov]

Hello everyone.

My system: iMacPro1,1 / 2620v3 / RX580 4GB / X99 v102 / DDR4 16GB 1866 / SSD SATA 512 / macOS 11.7.4 / OC 0.8.9

In short: when you turn on the hackintosh, the video card gives a low result on the graphics (first link), also the consumption of 300mhz gpu / 300mhz memory in idle is about 60-70watt that's a lot. BUT IF you put the computer into sleep mode and get out of it, the consumption becomes normal and the results in geekbench OpenCL or Metal are almost 2 times more! also after sleep and video card consumption comes back to normal (screenshots) (second link)

As it should be. What could it be, who has encountered such a bug?
I tried to attach pr files, if I did something wrong please let me know.

https://browser.geekbench.com/v5/compute/6444667

https://browser.geekbench.com/v5/compute/6444669

 

[EliteMacx86]

Hello everyone.

My system: iMacPro1,1 / 2620v3 / RX580 4GB / X99 v102 / DDR4 16GB 1866 / SSD SATA 512 / macOS 11.7.4 / OC 0.8.9

In short: when you turn on the hackintosh, the video card gives a low result on the graphics (first link), also the consumption of 300mhz gpu / 300mhz memory in idle is about 60-70watt that's a lot. BUT IF you put the computer into sleep mode and get out of it, the consumption becomes normal and the results in geekbench OpenCL or Metal are almost 2 times more! also after sleep and video card consumption comes back to normal (screenshots) (second link)

As it should be. What could it be, who has encountered such a bug?
I tried to attach pr files, if I did something wrong please let me know.
View attachment 5558View attachment 5559
https://browser.geekbench.com/v5/compute/6444667

https://browser.geekbench.com/v5/compute/6444669

Well, this is a known bug with Big Sur and above. Till Ventura Beta, the fix was to use an iMac SMBIOS. Probably, an issue with the SMU firmware loading.

 

[insov]

Well, this is a known bug with Big Sur and above. Till Ventura Beta, the fix was to use an iMac SMBIOS. Probably, an issue with the SMU firmware loading.

you helped me very much. smbios imac19.1 helped me a lot! thank you so much! but i have one more little question, it is about sleep, not about graphics. can i ask you here, or should i create a new thread in another thread?

 

[EliteMacx86]

smbios imac19.1 helped me a lot! thank you so much!

Well, as per the SMBIOS guide, iMac SMBIOS always expects an IGPU which normally Xeon CPU does not have. You can read about it here:

GUIDE - How to Setup Correct SMBIOS [Clover/OpenCore]

How to Setup Correct SMBIOS [Clover/OpenCore] This guide covers setting up a Correct SMBIOS for Intel and AMD CPUs on macOS using Clover and OpenCore. By following this guide, you'll be able to set up the correct SMBIOS on your system using Clover or OpenCore Bootloader. I. What is SMBIOS...

elitemacx86.com

but i have one more little question, it is about sleep, not about graphics. can i ask you here, or should i create a new thread in another thread?

Marking this thread Solved. Please create a new thread for the questions or issues you may have.