I have 2x MSI Rx 570 Gaming 4G that I can't modify BIOS unless I use pixelclock patcher which causes my miner to crash.

I have 4 other cards that I modified their BIOS (using ATIflash) WITHOUT using pixelclock patcher and it works fine. Any ideas why this card absolutely requires the patch? Is there any way around it?

Thanks for any help.