Best solution I found to reduce power is this command:
sudo /opt/rocm/bin/rocm-smi --setsclk 0 1 2 3 4 5 --setfan 155
Could do 4 or 5 for the clock depending on how much power you feel like burning.
Do not run at stock clocks. As you found out the power usage is crazy and your card's health will be a problem if you continue doing that.
I do not think there is an easy solution for voltage. Probably involves modifying drivers/kernels or similar. Maybe someone knowledgeable will share. But I doubt it, as this kind of information tends to be kept private for some reason.
Hello vega owners..
What about playing with pp_table in linux?
Power consumption too much for lyra2z without ppt. 300w per card.
rocm-smi cannot control voltage. May be other tools? I don't know. And can't find answers in google and forums about Vegas.
Tools For RX5XX does not compatible to control vegs's.
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I try to change hex settings to control voltage. But when apply i see errors and nothing happened except system freeze and kernel panic.
J
Jun 4 13:22:13 vega-ubuntu kernel: [ 236.914530] amdgpu: [powerplay] Failed to register high thermal interrupt!
Jun 4 13:22:13 vega-ubuntu kernel: [ 236.914550] amdgpu: [powerplay] amdgpu: powerplay initialization failed
Jun 4 13:22:34 vega-ubuntu kernel: [ 258.238591] BUG: unable to handle kernel paging request at 00000000000011a8
Jun 4 13:22:34 vega-ubuntu kernel: [ 258.238836] IP: vega10_thermal_disable_alert+0x16/0x90 [amdgpu]
Jun 4 13:22:34 vega-ubuntu kernel: [ 258.238918] PGD 80000002660a5067
Jun 4 13:22:34 vega-ubuntu kernel: [ 258.238920] P4D 80000002660a5067
Jun 4 13:22:34 vega-ubuntu kernel: [ 258.238968] PUD 266159067
Jun 4 13:22:34 vega-ubuntu kernel: [ 258.239015] PMD 0
Jun 4 13:22:34 vega-ubuntu kernel: [ 258.239054]
Jun 4 13:22:34 vega-ubuntu kernel: [ 258.239108] Oops: 0000 [#1] SMP PTI
Kernel 4.13.0-43.