Quote Originally Posted by njl
I had connected the 8pin mobo connector to the mobo, but doublechecked the mobo manual and found that it should be the 2x4pin mobo connector instead so changed to that (everything turned off naturally)
Can I have fried something on the mobo when booting with the 8pin?
Not quite sure what you mean by this - are you saying you originally had a PCI-E 8-pin power plug in the motherboard? They're supposed to be keyed differently, because they're definitely not electrically compatible. If so, you might have borked something.