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Gigabyte AB350N Gaming WiFi sucks with iGPU OC and CPU Vcore

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1. Tell us your current hardware:
(Please list here and do not refer to the signature, since some do not see it and the hardware changes)

  • Processor (CPU): Ryzen 5 2400G (without cap and applied Liquid Metal)
  • Memory (RAM): 16GB Corsair 3200 DDR4 Vengeance LPX
  • Motherboard: Gigabyte AB350N Gaming WiFi (ITX)
  • Power supply: BeQuiet System Power 500Watt (yes, it’s a great size, I had more)
  • Case: Silverstone Milo ML04
  • Graphics Card: iGPU Vega
  • Hard Drive/SSD: Kioxia Exceria NVMe SSD 500GB
  • Other hardware that is obviously related to the problem (monitor model, cooling, etc.):
    • Philips 4k tv
    • Noctua NH-L9a-AM4

2. Describe your problem. The more precise and better you describe your problem, the better we can help you (additional images might be helpful, for example):

The board is behaving strangely. If I set the Vega 11’s GPU clock to 1500 MHz in BIOS and boot, at first nothing happens in the OS, the clock rate continues to dynamically oscillate between 400-1240 MHz depending on the requirement.

As soon as I set the GPU voltage in the BIOS, it gets weird (1.1 volts keeps 1500 MHz stable, i.e. the default voltage for the GPU):
The GPU clock works, the additional performance (~10%) can be measured in the Unigine Heaven 4.0 benchmark, but the APU heats up disproportionately.

The same game also works with Ryzen Master. GPU up to 1500MHz, voltage (cannot be disabled separately) at 1.1V also works with measurable clock confirmation. The CPU also gets very hot here and reaches 90° for a short time (totally outlier, even with full Prime load with BIOS defaults).

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I then noticed the following in HwMonitor: The CPU Vcore, which otherwise jumps to a maximum of 1.45V for a short single core boost, ranges between 1.5V and 1.55V for all cores. As soon as the GPU voltage is addressed, there seems to be a simultaneous up-compensation applied to the CPU cores and that’s crazy.

I’ll still test what happens if I also manually set a negative CPU Vcore offset in the BIOS instead of leaving it disabled with “Auto”. But I would like to know (if possible from the board owners) if I have a monthly model or is it really serial garbage? The 300 and 400 boards don’t seem to have been the best in a row 🤷‍♂️ Probably prefer an Asus or Asrock next time ;)

EDIT:
OMG. The max negative offset is -0.1375V, I can’t get to the smooth 1.4V max from the hype 1.55V. But it’s still tolerable. Now that the CPU isn’t glowing nonsense, I also read the GPU voltage, which was fixed at 1.1V and lo and behold, it’s at 1.2V. What do these Gigabyte BIOS developers do during their working hours? ?

3. What steps have you already taken/tried to solve the problem and what did you do?
BIOS update to the latest Agesa, but Gigabyte didn’t seem to have fixed anything.