dammit!
Just tried to plug in the power to the new motherboard and it's got a 24 pin power socket and an 8 pin power socket!
My power supply only seems to have a 24pn and a 4pin (in a square shape) power plugs (although the 24pin splits into a 20pn and an 4pin, but I don't think that helps here).
Is the 12v 8 pin plug required for the mobo to work? I'm guessing yes...
edit: I've just made delivery cut off for tomorrow, so i've purchased the gigabyte as it looks like it's only got 24pin + 4 pin power which should be ok, unless anyone knows any better?