Hello,
I followed the instructions in this thread
https://bitcointalk.org/index.php?topic=200777.0 about the 7970. I have a ghz so I tried flashing my gpu bios with this bios
http://www.techpowerup.com/vgabios/127156/gigabytehd7970-3072-120905.html.
The flashing went ok, but the cards still has the same hashrate (from 480 to 530 more or less). I noticed I cant actually change my gpu settings on cgminer (version 3.7.2, I'm mining with --scrypt). Trying to change the clock speed wont do anything. Also, changing clock speed through catalyst control center or msi afterburn will work for other programs, but not for cgminer. Has anyone ever had this problem? How did you solve it?
Thanks for the help.