Inspecting the kernel messages for my ASRock Radeon RX560 4GB card, I found
some messages which do worry me a bit. In particular:
Nov 24 23:17:00 i7a kernel: [drm] BIOS signature incorrect 0 0
Nov 24 23:17:00 i7a kernel: amdgpu 0000:01:00.0: Invalid PCI ROM header
signature: expecting 0xaa55, got 0xffff

Nov 24 23:17:00 i7 kernel: amdgpu: [powerplay] amdgpu: powerplay sw initialized
[...]
Nov 24 23:17:00 i7 kernel: [drm] Found UVD firmware Version: 1.130 Family ID:
16
[...]
Nov 24 23:17:00 i7 kernel: [drm] Found VCE firmware Version: 53.26 Binary ID: 3
[...]
Nov 24 23:17:00 i7 kernel: amdgpu: [powerplay] [AVFS] Something is broken. See
log!
Nov 24 23:17:00 i7 kernel: amdgpu: [powerplay] Can't find requested voltage id
in vdd_dep_on_sclk table!
[...]
Nov 24 23:17:00 i7 kernel: [drm] UVD initialized successfully.
[...]
Nov 24 23:17:00 i7 kernel: [drm] VCE initialized successfully.
[...]
Nov 24 23:17:00 i7 kernel: [drm] Initialized amdgpu 3.15.0 20150101 for
0000:01:00.0 on minor 0
[...]
Nov 24 23:17:36 i7 /usr/lib/gdm/gdm-x-session[2649]: (--) AMDGPU(0): Chipset:
"Radeon RX 560 Series" (ChipID = 0x67ef)

Kernel: 4.12.14-lp150.12.25-default