I wonder what is going on....

I have 4 x 6 Vega64 rigs. All running with the same setup (OS, drivers, versions etc.)
When I applied the TRM 0.4.4 only one of my rigs got significant performance boost.
In this very rig 5 out of 6 Vega64 has ~2400H/s but one still has ~2100H/s and the same one has also regular interleave adjustments.
All the other GPUs in 3 rigs all have ~2100H/s and regular interleave adjustments.
I would like all the rigs to perform like ~2400H/s per GPU, but wonder what could be wrong with the most of the GPUs and rigs?
I tested 14*14 and seems that interleave adjustments are gone but hashrate remains ~2100H/s level per GPU.