Might look at this;
http://www.newegg.com/Product/Produc...82E16812145002
24pin Motherboard Cable to 20pin Power Supply
Don't confuse with cheaper parts that are "20 pin Motherboard cable to
24pin power supply." They aren't the same thing. My 24pin
powersupply lets me detach the extra 4 pins for 20 pin motherboards.