I have the motherboard fitted, and just placed the power supply in the case.
I have a problem though
The 24 pin fitted fine, with a bit of stretch, but the ATX12V connection (which is only 4, not 8 on my PSU) won't stretch far enough, as its on the very top left of the board
So, i can't even power it up.
Looks like I may have to buy a new PSU doesn't it, though this one was new!