JIm, I've got a 300 watt psu and that struggled to power a geforce 6800 ultra card

That's the same brother that sold you a card you didn't need m8 ? No offence, but listen to what the "geeks" are saying



http://www.microdirect.co.uk/Product...7883&GroupID=9

Seeing as you must use that site, I would say the above link PSU or higher.

You've paid good money for something you didn't need, and have to make a serious decision about where to go. If you don't want to listen to the people on this thread, then best of luck with your brothers advice, and let us know how long it lasts