Multihash 480? Wow that's quite a bit lower than what I was trying to tweak with. No wonder it wasn't even starting.
Ok so that seems to work now... however speeds are terrible. avg 270 h/s per 570. What am I doing wrong?
I have no clue.
Mine is mining XHV at 945 h/s with:
GPU clock: 1380 MHz
GPU voltage: 1000 mV
Mem clock: 2110 MHz
Timing from PBE 1.6.7 and Samsung memory.