New to mining, have recently built a rig with 8 of these cards...all are Sapphire RX570 nitro+ OC ....4 of them are 4gb Elpida and the other 4 are 8gb Hynix.
I've been attempting to flash BIOS on the 8gb Hynix cards (dual BIOS switched to silent) with no luck whatsoever...not even simply copying the 1750 base straps to 2000 and 2250 has worked....always get the yellow warning triangle in Device Manager after reboot. Using AMD Blockchain Beta drivers on fresh WIn10x64 install, Asus mining expert board.
The bizarre thing is that I get different size bios roms depending on what I use to save the BIOS...256k with GPUz and 512 with ATIflash. Not sure what I'm doing wrong here or how to even proceeed OCing my cards. They are all hashing at about 22mH/s out of the box dual mining with Claymore.