HD7970 really slow?

hi, i have been playing wwith this, and i notice my HD7970 is always so slow hashing...
right now it hashes around 56H/s.....even my cpu core-i5 hashes higher than 1000H/s...
been trying different drivers to no avail...

i'm on windows 7 and tried:
non-whql-win7-64bit-radeon-software-crimson-16.11.5-nov25.exe

non-whql-win7-64bit-radeon-software-crimson-relive-17.11.4-nov27.exe

both say when starting i have the wrong driver...

requirements supposedly are:
AMD GPUs on Windows require "AMD Radeon Software Crimson Edition" (15.12 or later)

so, do i need to go back all the way to 15.12?

thanks