Powercolor RX470 Crypto mining Edition GPU, Samsung memory not great. RX 470 bio mod

I'm not a fan of Samsung GPU ram. I can't seem to get as much megahash with it. I doesn't like to overclock like Hynix memory. I The most I'm able to get is about 25 megahash. I usually get around 28 megahash on RX470's. The firmware that came on them would crash my system. I had to factory flash the bios then bios mode them. These aren't great performers.

Thermal Paste I use on all my cards
https://www.amazon.com/gp/product/B07LF66ZSV/ref=as_li_tl?ie=UTF8&tag=fintechcomm0f-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B07LF66ZSV&linkId=aee4fb9229eed8f80b0fc81282303286