I gotta join here too. My build has a Vega 64 from MSI. The crappy air boost OC, which I only bought for the reference pcb. Put a Heatkiller IV on it and threw some water at it. Then flashed LE-bios over and now I fiddle with it.
There are some problems I had to overcome, like that my card demands voltage and refuses to cooperate if it has not atleast 1.13V. I still think it´s not really the voltage in P6/P7 but in one of the lower states, since it´s not binned to run the LE-bios. I use the 'memory voltage', which actually seems to be a baseline voltage for the card instead, and if that´s at 1V I can lower my P6/P7 a little more.
Atleast I can feed it some electrons without it heating up too much. This was after 20 minutes of Heaven benchmark with an attempt to get a stable baseline for core clock and +20% powerlimit:
core clk // HBM clk // core tmp // hotspot tmp // HBM tmp // VR SOC // VR Mem // GPU load // GPU power draw // Mem. usage // Voltage
1707.0 MHz , 1015.0 MHz , 42.0 °C , 64.0 °C , 46.0 °C , 61.0 °C , 59.0 °C , 99 , 313.0W , 1260mb , 1.1875V
1668.0 MHz , 1015.0 MHz , 41.0 °C , 63.0 °C , 45.0 °C , 61.0 °C , 59.0 °C, 99 , 300.0W , 1256mb , 1.1875V
1698.0 MHz , 1015.0 MHz , 41.0 °C , 65.0 °C , 45.0 °C , 61.0 °C , 59.0 °C , 99 , 314.0W , 1256mb , 1.1875V
It slurps the power like a champ, but the clocks are not where they could be. Next problem I encounter right now is, that wattman or the card does not care to what I tell it to do. That the core speed bounces around a bit is normal. On my card however, it sometimes just overshoots into the 1800MHz range which results in a crash shortly after. Like I set P6 to 1702MHz and P7 to 1737MHz and it runs at 1750MHz with 1.2xV and the powerlimit maxed out. This seems stable for a minute or two and then I suddenly see the speed jump for no obvious reason to 1820 and it crashes.
I´m still trying to figure out why it does that and how I can prevent that. Because I think atleast 1740ish I can get to work, if not for that sudden overshoot.
Oh and in non-3D workloads Vega behaves a lot better (that GPUPI result is still crappy tho, and I find it a bit funny that the last v2.4 produces faster results by about 0.3s):