My power supply cable to the motherboard is only 20 pin and the motherboard has a slot to take a 24 pin power cord. The 20 pin will fit but 4 slots are just left empty. The motherboard LED light comes on showing it has power. When I try to boot up the motherboard runs but the hard drive doesn't boot or the screen isn't working. Could this be b/c of not having a 24 pin power cable?I know the video card and HD work b/c I just transfered them from another motherboard that was a 20 pin. Any ideas?
Yes it will work, but it may affect your system's performance.
yes it will... most of the power cords are 20pins now... the mobos are built for 24 just for compatibility with some rare power supplies... just stick it in all the way to the left and leave the right 4 pins empty... about the boot problems check your RAM speed... more than likely you have old RAM sticks that cannot run on your new mobo (by the looks of it it seems like you just purchased a new one)... most new motherboard will not take anything less than 400MHz... I think you will have to purchase new RAM too... that is usually the case...
I believe it'll work, 4 pins will just hang off to the side. The same goes for 8 pin power cables to a 4 pin power socket on the motherboard.