Originally Posted by kahloq
It might not be the PSU, you may have a faulty bios. Problem is, if you flash it and then it dont work and somehow you cant get it flashed back, then warranty is poof UNLESS you talk to your cards tech support first and ask them if they want you to try it. In any event, you should backup your current bios on the card.
It's an MSI card and unfortunately they only provide support via email and that is to their Taiwan Headquarters. I've emailed them describing the problem and I've had an auto-reply telling me to expect a reply within 48 hours.
I'll see what they have to say on the matter.
Given that some people have been using very low spec PSUs I had hoped that I would be able to run a NU on one of my two PSUs. But as you say it might not even be a PSU problem.
My mistake, MSI UK do provide Technical Support via an online form.