V1.6.0Do you have any success with per.mem on ?
Using it should allow to go for a bigger intensity setting, on my test card (580 8g) algo normalv7, the best setting was i:54 / w:8 / t:2 i got ~926hs , now i can go to i:60 without problems, and have ~933-936hs
edit: i:63 ~940hs

I am running on an 8xVega 56 rig. So far I have only tested v7 algo. With unchanged i:/w:/t: settings here are what my initial tests show (only ran for 15 mins each):
Unchanged i:/w:/t: settings (i:112/w:8/t:2), average h/s per card:1.5.8 - 2016 h/s
1.6.0 - 2012 h/s (pmem: false)
1.6.0 - 2020 h/s (pmem: true)
I can provide more test results later with different intensities and algos if helpful.