A question for those who have experience mining ETH with Radeon Cards:

I don't have a lot of experience with AMD chipset cards, but I'm thinking of adding a couple of RX 580s to my ETH machine.  I've narrowed my search down to the Sapphire Pulse, or the Sapphire Nitro+ (8gb cards.)  Which would you choose?  Any recommendations for bios settings and how to flash the bios for a first timer would be really appreciated.

TIA