It won't work without at least 1 memory stick installed, do you have 1 stick of memory inserted?
I see. I wasn't aware of that. The sticky made it seem otherwise.
It still doesn't boot up properly, unfortunately. The moment I switch on the PSU (not the mobo power switch), the fans all spin for about a second then stop, rinse, repeat.
And no, other than the drives (which aren't plugged in atm), all of these parts are new.