Sapphire Vapor-X 7970 GHz Edition litecoin mining low hash rate problem solved

Hello,

i have this card and i really could't get it to mine with more that 540 kh/s (litecoin), by luck i found this thread : https://forum.litecoin.net/index.php?topic=2963.0 and that solved my problem i got it mining with 720 without any tweaking.I did not found this solution if you want to donate or thanks anyone go to the thread i linked above :)

here are the instructions coped from the thread:


INSTRUCTIONS:
1. Download this Sapphire Video card bios:  http://www.techpowerup.com/vgabios/129658/Sapphire.HD7970.3072.120926.html
2. Download the ATI flash utility:  http://www.techpowerup.com/downloads/2230/ATIFlash_4.07.html
3. Create a bootable USB stick using this utility: http://rufus.akeo.ie/
4. Copy the BIOS and flash utility to the bootable USB stick.
5. Reboot from the USB stick.  DOS type command prompt will show up.
6. Run "atiflash.exe -i" which will show you the device IDs of your cards.
7. To start rewriting the BIOS, run "atiflash.exe -f -p 0 new.rom" where you replace "0" with the 7970 card device ID if different. "new.rom" is the filename of the BIOS you downloaded.
8. When it says successful, reboot.

i will only add that you may want to backup your current video card bios, so if you ever want you can flash it back.

that's it ! happy mining and thank to wugubob for this solution :)