I've been thinking of patching the memory straps of my HD7950 cards. They both have Hynix VRAM so they should be suitable for this hack. Is it enough for me to follow the steps on this page: ?
http://www.overclock.net/t/1554360/tahiti-memory-timings-patch-for-hynix-vram

Basically: download the BIOS file, open it in VBE7 and save it & use the patch tool to implement the BIOS file?