Do I need to connect the p4 power connector from the power supply to the motherboard if I have an AMD 2500 barton proccessor and a NF7S ver. 2 motherboard? If so, what does it do for me? A person at the local pc shop said I should connect it. A web page says: Newer ATX power supplies also have a special four-pin power connector (Figure 9), which is used with Pentium 4 mainboards. If you’re installing an AMD Athlon, you won’t need this special four-pin connector. Just leave it disconnected.