Gigabyte G1 guerrilla

suteck

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It will most likely function at a reduced rate. Won't be able to use all the functions and your video card might not work. Not to mention part of the power going to your cpu. But if your psu doesn't have the required connectors you can try this 4-Pin to 8-Pin ATX Adapter Cable - 4 Inches - Sleeved. However, that psu isn't going to run the rest of the equipment you're planning on connecting in your computer if it isn't designed to power the mobo itself.