Small update:
With newest WHQL Adrenaline Drivers (19.12.2) I've managed to run VRAMs stable @ 2200 MHz, and I might try even higher.
It would be awesome if somebody could tell me how to manually adjust timings in a safe way, or have PBE update for these set of Samsung VRAMs (K4G80325FC).
Maybe for Christmas?

It's no problem to add K4G80325FC in PBE, but you need to test what Uber-mix will fit, I can send you also some of mine test timings which could fit also.
Send me your bios to
monerobiosedit@gmail.com pls.