I tried to edit my mem timings in Hex editor, but i cant figure out how to copy paste the new code into the old code, i have to type every digit 1 by 1 and its not working, brainexplosion, and im scared to brick my gpu it has no dual bios.
There's ~ a billion guides on how to edit and flash bioses for AMD cards out there. 
Plenty of software gui tools that allow easy copy/paste editing. Here's one such guide: https://bitcointalk.org/index.php?topic=1954245.0