I would try deleting the .bin files in your cgminer directory. Also double-check your overclocking settings in the ATI control panel to make sure some kind of throttling isn't happening. I would also suggest downloading another version of cgminer to another directory and copying your .bat file over.
Thanks mate, I'll give it a go.
I've tried that - new version of cgminer 3.7.2 and still the same

I will try a different PCIe slot on the board.
Edit/ its running like my sole 7950 lol