Quote from: VirosaGITS on April 01, 2018, 08:37:37 PM

As someone brought up before, AMD is releasing stuff for Polaris Soon. Our tool isint limited in this regard, however.

Polaris undervolt under AMDGPU is possible NOW (and I think it also can be done for Vega but haven't actually looked at the code for that) - but you have to hack the applicable kernal module and it's an ugly mess - and trying to do it with individual undervolt for each card is going to be a major PITA on the current AMDGPU version.
AMDGPU however does NOT support undervolt OR clock control for R9 series cards (try it, the clocks DO NOT MOVE no matter what settings you use), and STILL offers exactly ZERO support at all for the iGPU on AMD A-series CPUs (even the GCN ones)
OpenCL for SOME APU models under ROCm is supported (works on the 7890k and 7860k, I've not tested on the 5700 as that's pre-GCN, and I don't have any other models to test it on) but forget trying to use APU graphics if you have anything else in the system using AMDGPU.

*SUPPOSEDLY* they are adding undervolt control to "the next version" of AMDGPU - but ghods only know when that will show up, and if it will work with anything OTHER THAN Polaris or Vega.

In my testing, the undervolt DID reduce power consumption some on Polaris cards that are not already BIOS modded, but I don't recommend trying to do so on modded cards due to how the driver code is set up.
The Phoronix "818" figure proved to be rather optimistic across a range of RX 470/480 cards for stability though, I think I ended up at 850 or 860 before I finally got the rig to be stable for more than a couple hours at a time.

Real driver support on a per-card basis would be a LOT better.