Gave up trying the this way.

Ended up using GUIMiner-scrypt

In AMD OverDrive I set core to 885, memory to 1300, fan on auto, power control to +20.

In GUIMiner-scrypt I chose the 7770 preset and then changed the Intensity to 14 as I work on this PC as well.

7770 now running at ~185 khash/s