Almost all current motherboards power their CPU with a 12 volt CPU power cable. There are two kinds: the 4 pin 12V cable and the 8 pin 12V cable. The 4 pin cable is often called a P4 cable (although it's a very bad name) and the 8 pin cable is called an EPS12V cable. The P4 cable is the most common. You should find it on 90% of power supplies you buy on the market, regardless of how many watts they have. Some power supplies have both the 4pin and 8 pin cables for redundancy. ~~~ All modern power supplies nowadays have 4 pin CPU power cables. They come as a standard. The 24 pin ATX power supply is also quite common, it's kind of hard to get one that's 20 pin nowadays.
