Alright now i have tried 5 bios' besides the stock one. Some from radeon2.ru and then the ones that Gr8s1 has. 97ProLL is the origional bios this thread is about.
I tested each one at a conservative clock(for me) 426/372. Then i stepped mem up to 392.
fly97300 bios.. At my common clock i got major corruption just at the loading screen for 3dmark so i didnt test it... lol
97mufuN/9700p101/9700p103 VIVO.. These seemed to be all the same exact bios.. with on for VIVO cards. 3dmarks within 5 points of eachother and alot of artifacting/pixelation at 392.
97ProLL(102 according to stereo).. 3dmark 50+ points above the other 3.. no artifacting at 392.
So the 970ProLL bios wins.. it seems these are all just BBA bioses for 9700Pro with Samsung memory, except the Fly one.. 97ProLL is the newest i believe besides the VIVO one, but i think it is actually the 101 for VIVO cards.