Have installed 8 RX 580 4GB Nitro+ Elpida memory. 7/8 cards are getting around 30.5 mh/s @ 2050 mem and 1150 core. The last card I'm not able to get past 1900 mem..i can push a bit more with error and if I set 2000+ windows crash. It is the exact same card model with memory type etc as the other card all brand new with same serial also.

I thing I noticed is that dag creation ms is higher on this specific card.

Anyone seen this or cause it ?