i had the same problem, luckily the new mobo i got has both types of plugins, too bad the damn thing was DOA. EZ cheap fix, that is if you don't mind modding your case power plug, is to snip the end of it, find the plug you need from like maybe an old case, and use those twist-on wire terminals to connect it go the plug wires. it's ghetto, but it works. I had to do that with a PCI slot fan because i screwed up the power cable.