RVN mining crashing

My rig has 2x FHR 3070s and a LHR 3060. Mining ETH works fine, but RVN mining crashes consistently. I’ve never been able to run it for more than 6 hours. I thought the card on the MOBO which gives display (3070) might have had a high overclock so I turned it down to +900 mem (previously 1300) and 0 core at 80 PL but no luck. Is it possible one of the other 2 cards connected by risers might have a high overclock causing the crashes?

I’m mining using TREX through ethermine