I'm on the 821, this is the newest.Did read that am AGESA update was causing system hangs, can't pinpoint where I read it too...
Some of the GSkills 6000 kits look well priced, if I could have waited, I would have got one of them. That said the difference between 5200 CL40 and 6000 CL 30 is not that big outside memory benchmarks, it not like AM4 where you get 20%+ extra fps. Also, think the 32GB stick have 4 banks (or ranks?) and the 16GB have 2, so with 64GB you end up with 8 banks for 2*32GB or 4*16GB so they should perform the same. I would get 2*32.It’s probably more likely to run perfectly fine at XMP as well. The only thing I still need to do some reading on is if there is a sweet spot for speed/timings if filling all 4 dimm slots.