I've had no issues on my ASRock X870E Taichi from the very beginning. I'm running four 24 gig sticks at 6000 MT/s (Corsair, all bought before the crazy). I didn't realize people were having this many issues. These are on the certified lists from the manufacturer of the motherboard. Never had a problem. They've been working through multiple AGESA updates / multiple BIOS updates without a hitch.

I’m on an MSI x670e with 4x32 sticks, also Corsair. Never gotten training beyond 3600. I’ve recently seen people posting success stories on my same motherboard at 6000 MT thanks to newer bios AGESA. But none of that has worked for me.

X870e is not am4 though. That's ddr5 and a different memory controller.