No FireWire does not need a separate power supply to operate. FireWire is used to connect peripheral devices to a computer.
The 4-pin FireWire connector must use a separate power supply.
The 6 wire FireWire 400 cable includes 2 wires that supply 30VDC power to the device that are left out in the 4 wire cable to permit use of a smaller connector.
I know it as a P4 power connector. it works for many CPU's.
Many/most motherboards have a separate power connector for the CPU. Check your motherboard's installation instructions to locate the CPU power connector. Then connect the matching power supply cable to the CPU power connector on the motherboard.
usb and firewire
If it as a 20 or 24 pin connector and a 4 pin connector then it is a ATX power supply.
USB and FireWire
Usb and firewire
CPUs get power from two places-- From the motherboard through the tiny pins on the bottom of the CPU (Which in turn gets power from the 20 / 24 pin connector that connects tot he power supply) and from a 4 / 8 (Only on the newest boards) - pin connector that directly feeds the CPU a very steady supply of power. Both come from your actual Power Supply.
The atx 12 connector is one of the motherboard power connectors and used for 12 volt power connect for cpu voltage regulator.
8-pin power supply connector with 150 watts
the optical drive will connect to the power supply with a connector called molex connecter it is a 4 prong connector
24 pin connector is required to supply power to the motherboard.