Just tried - set REF to 5 (default) - 32,9MH, REF 90 - 34,2MH

Speed didn't change immediately, just need 10-20 seconds...
good timings

Just obtained couple of nitro+ with 4gb trying to get the sweet spot with --REF value, looks like 90 is a good startso we will see...wonder if same goes for samsung memory
P.S. rx570 doesn't like --REF 90