First time builder... wondering what type of power supply I should use to be compatible with my "ASUS P8Z68-V PRO/GEN3 LGA 1155 Z68 ATX Intel Motherboard"? Specs show it has 24 pin for power connector, which is simple enough to find, however for the 12V connector it has 8-pin setup. What is difference between regular power connector and 12V? Also if anyone has any suggestions for a 600-750W product I'd appreciate the help (link or part # please)