Hello, ive a rig with 5 Cards (RX 570/470 all) and only the first main is 8 GB (the rest 4)

With rxboost 1 (or the vm comand in the correct number) without -Power + OC) i had in the past (before, in 2020 start) 26K in the main card, and 24/22/24/23 Mhz in the 4gb cards). Since the Epoch 384 and the last version of phonix, i have a lot fallen of hash rate (the 8 GB card no problem) but the rest 4 gb, all in 16K average.

I already read this was possible, so hard the fallen? can i do anything with some command?