Arch Linux

Solyariy

Member

Registered: 2023-07-12

Posts: 2

RX 7600 low power limit and uncontrollable fans

After I upgraded to RX 7600 I've noticed that in games my GPU only outputs 145 watts while vendor of my card specified power limit to be 185 watts, which it has on Windows but not Arch.
I've tried adjusting power limit via Corectrl but it doesn't allow to go higher than 145 watts. Also fan curve ain't working.
I've adjusted my GRUB config with

amdgpu.ppfeaturemask=0xffffffff

and remaking

grub.cfg

but it didn't work.
I've updated my mobo's BIOS to latest one - didn't help either

Here is firmware:
-Kernel: 6.5.3-arch1-1
-GPU driver: Mesa 1:23.1.7-1

Here is inxi -Gx:

Device-1: AMD Navi 33 [Radeon RX 7700S/7600/7600S/7600M XT/PRO W7600]
    vendor: Sapphire driver: amdgpu v: kernel arch: RDNA-3 bus-ID: 03:00.0
  Display: x11 server: X.Org v: 21.1.8 driver: X: loaded: amdgpu
    unloaded: modesetting,radeon dri: radeonsi gpu: amdgpu resolution: 1920x1080
  API: OpenGL v: 4.6 Mesa 23.1.7-arch1.1 renderer: AMD Radeon Graphics
    (gfx1102 LLVM 16.0.6 DRM 3.54 6.5.3-arch1-1) direct-render: Yes

barthess

Member

Registered: 2012-08-20

Posts: 9

Re: RX 7600 low power limit and uncontrollable fans

Have the same issue with Sapphire Pulse RX 7600. Found this thread https://gitlab.freedesktop.org/drm/amd/-/issues/2356. Tried 6.6-rc kernel, 6.1 LTS kernel, manual source hacking but nothing helped. Looks like the only way is to wait for 6.7 kernel.

barthess

Member

Registered: 2012-08-20

Posts: 9

Re: RX 7600 low power limit and uncontrollable fans

After some investigations I've realized that this issue is not with power limit itself but with monitoring tools. They just use different "sensors" for monitoring. Vendor limit 185W is TBP and it shows in windows monitoring tools as GPU power. Linux monitoring tools show the PPT. The PPT power limit is 145W both in windows and linux. See the screenshot of my HWinfo https://imgur.com/a/PvD3QtP