My computer is previously installed with gigabyte motherboard. Yesterday I have bought a Cooler Master Silent Pro 500w. The motherboard only has 24 pin connector. When I try to connect the PSU power connector to the motherboard, it only fits 20 pin part but the extra 4 pins won’t fit at all. A small plastic piece preventing other 4 pins not to fit. I cannot replace the PSU now. Is there any workaround?