It is an Sapphire 7950 Vapor-X R2 with two 8 pins. I think i has 7970 PCB becouse even 280X vapor-X bios was working.
Anyway highest i did is 1175/1575 but for stability i just use clocks above.
I noticed it appeared new 280 bios here on techpowerup so i wanted to play around with one 7950 i had here. After flash everything was fine Vbe7 modded ofc for id change (it changed to 200 series) but voltage seems bugged. It's stuck at 0.999 so every game or benchmark crash right away with...