AMD 6600 on macOS: custom Zero RPM with softPowerPlayTable on DeviceProperties

[miliuco]

is there heating in 4k resolution too?

Trying 4k resolution for a long time temperature is below 35-40. Only benchmarks stressing rise up to 75 or 80.

 

[RUSSKIYVOLK]

Trying 4k resolution for a long time temperature is below 35-40. Only benchmarks stressing rise up to 75 or 80.

I noticed that in Windows, if you disable the adaptive synchronization function in the monitor, the temperature of the video card behaves the same as in macos.Maybe it somehow affects.

 

[miliuco]

I noticed that in Windows, if you disable the adaptive synchronization function in the monitor, the temperature of the video card behaves the same as in macos. Maybe it somehow affects.

Maybe. I don't have an explanation for this. I'll try Windows with this option disabled and will see.

 

[sselshamy]

Is there any way to get the registry code without Windows access.

 

[tedyun]

Is there any way to get the registry code without Windows access.

I think @zirkaiva posted a method how to extract the sPPT on the Mac OS using this script:

macOS 12.3 Update Causes Problems for 5700/6800/6900 Graphics Cards

Yes DeviceProperties/Add/PciRoot(0x0)/Pci(0x2,0x0)because you can't boot with just EGPU ON Mac Min --> so you boot with both attached then just before.Mac Osx desktop --> switch-to-external-gpu kicks in and your left with just EGPU--> And no IGPU long time ago i asked about this and a lot of...

www.tonymacx86.com

I haven't tried it, so I can't walk you through, but it looks pretty simple.

 

[zirkaiva]

I think @zirkaiva posted a method how to extract the sPPT on the Mac OS using this script:

macOS 12.3 Update Causes Problems for 5700/6800/6900 Graphics Cards

Yes DeviceProperties/Add/PciRoot(0x0)/Pci(0x2,0x0)because you can't boot with just EGPU ON Mac Min --> so you boot with both attached then just before.Mac Osx desktop --> switch-to-external-gpu kicks in and your left with just EGPU--> And no IGPU long time ago i asked about this and a lot of...

www.tonymacx86.com

I haven't tried it, so I can't walk you through, but it looks pretty simple.

You can modify the PPsoft table in Windows with MorePowerTool

Save the edits in .mpt file

RED BIOS EDITOR and MorePowerTool for Polaris, Navi and Big Navi - MPT 1.3.11 | Support for RX 6950XT, RX 6750XT, RX 6650XT | igor'sLAB

The More PowerTool (MPT) now also supports the Radeon RX 6950XT, RX 6750XT and RX 6650XT. Besides helpful defaults for the power budget and various voltages, the tool also enables improvements in the…

www.igorslab.de

delete/cut the bytes in the MPT file upto A609:

And you have a modified table extracted.pp_table ready to be applied using the script to SSDT:

Download and cd to upp

git clone https://github.com/sibradzic/upp.git && cd upp

python setup.py build

python setup.py install

upp --pp-file=extracted.pp_table extract -r AMD.RX6900XT.16384.201104.rom

thefile=/Users/mbp114/Downloads/upp-0.1.3/extracted.pp_table \
printf  "\tPP_PhmSoftWTTable,\n\t\tBuffer (0x%X)\n\t\t{\n" $(stat -f %z "$thefile")
xxd -u -g 1 < "$thefile" | \
perl -nE '
    if ( m|^0000([0-9A-Za-z]+): (([0-9A-Z]{2} )+)( +)(.*)| ) {
        $o = $1; $b = $2; $s = $4; $c = $5;
        print "\t\t\t/* " . (uc $o) . " */  " . $b =~ s/(..) /0x$1, /gr . $s =~ s/   /      /gr . "// " . $c . "\n"
    }
'
printf  "\t\t},\n"

 

[miliuco]

@zirkaiva
Interesting! I haven't read the post with this method yet. Thanks for the info.

 

[f1zzas]

Hi guys, is there any tool/way to control GPU fan speed on macOS? (RX 6600). I want to keep my GPU FAN speed lower or sometimes even zero while it is on 50-60C.

 

[miliuco]

Hi guys, is there any tool/way to control GPU fan speed on macOS? (RX 6600). I want to keep my GPU FAN speed lower or sometimes even zero while it is on 50-60C.

I don't think so.
But if you don't use softPowerPlayTable, having only WhateverGreeen and agdpmod=pikera in boot-args, the RX 6600 must run with Zero RPM feature activated with fans spinning only over 60º.

 

[f1zzas]

Yea, but the problem is that the Zero RPM mode switches randomly and that's annoying, for example right now it's 53C and GPU fans are spinning :/