I decided to get an 3XS Asus ROG STRIX X570-F GAMING Board, AMD Ryzen9 3900X MPK, 2x16G CorVenRGBPRO DDR4 3200 and Corsair H100i Plat Liquid CPU
Cooler.

I purchased it from Scan and had it assembled and stress tested.
Like my two other Asus boards (x470 and extreme with CPU's and memories. It freezes intermitently.

So the problem is likely my Sapphire AMD Radeon pulse RX5700.
I have researched on the net and it seems that there are a lot of issues with this card and other cards.

Has anyone managed to get a stable unit with this setup and can offer advice to me of how they did it.
Sorry if i have posted this in the wrong area.

Many thanks for any info.