Hey guys quick question, i'm using the xfx 7970 double d edition. stock 925/1375

My question, from doing my research online it appears xfx no longer use the reference pcb in these cards, cost saving, so the pcb isn't AMD any more. Would it be safe to flash the bios mentioned in this thread?

I'm struggling to get 550kh/s out of it at 1025/1375