I have tried all the versions of the darkcoin gpu miner and all varieties of TC, shaders, intensity, etc.

But all I can manage to get is HW errors, no other message on the screen, no rejects, accepts, or "above share", just HW errors. Hashrate is fine but only hardware errors... Yes I have "-k darkcoin"..

The rig is Windows 7, with six 7950's ..

I have another rig running linux with three r9 280x's and sgminer compiled and runs just fine no errors and a great hashrate..

I totally baffled, any help would be great.