I built a new system but there is an issue that enabling normal memory speed results in graphics freezing regardless of what OS it is running in (Windows & Linux).
Either enabling XPM profile or raising memory speed from 2100 -> 2400 causes the issue. However, CPU and memory tests run fine, the problem is only with 3D accelerated applications. The picture hangs soon after starting some 3D applications with a pattern shown on screen and Windows blue screens.
I sent a support request to Gigabyte & AMD but maybe someone here has had a similar issue or has some idea what is going on.
In the meantime I have a new system with memory running at 2166MHz
Radeon Pro 4750G
Gigabyte B550M S2H F2 bios
G Skill Aegis DDR4 3200MHz CL16 (F4-3200C16D-16GIS)