I'm building a new machine with a Gigabyte GA-P55-USB3 motherboard and it won't POST. The beep codes indicate a power problem. The PSU is 500W, which should be ok, but it has 4-pin 12V connector for the CPU, whereas the motherboard has an 2x4 pin socket for same. The 4-pin fits in one end of this 8-pin socket, but it won't POST which leads me to believe I either need a different PSU or some kind of adapter.
Anyone any ideas?
Thanks in advance.