Pinout of computer power supplies

There are cases in which it is urgently necessary to connect any of the devices to the power supply of a personal computer. In order to prevent accidental short circuits or unstable voltage supply to devices. Short circuits can damage all devices connected to it, as well as the power supply itself. Knowing what and where the voltages are on the connector will be quite useful. Any computer power supplies have at least 4 “Molex” type “connectors”, they are connected to it HDD, additional cooler, CD drive; one of which is for connecting a magnetic floppy drive and a twenty-pin connector, which is designed to supply power to the mother card.

A modern power supply has quite a lot of power, which allows you to connect more devices you need.
For example, modern video cards can no longer receive power from motherboard - it simply won’t be enough for them, this is why special connectors in six or four pin designs are used, of which one to four copies are required (in cases of power supply to more than two video cards, it is possible that more than 4 copies of this type of connector will be needed).

Of course, power supplies must be equipped with the necessary connectors right away, because it will be impossible to add them in the future.

Computer power supplies in many cases have only three voltages: 3,3; 5 and 12 volts. The remaining voltages can be useful for powering various components, for example, on the motherboard, by converting these three basic voltage values.

When pinouting computer power supplies, you need to very often look under the cover of the power supply itself; examine its components, resolder components, and sometimes measure voltage. Remember that the power supply must have real electrical parameters (declared) and be of high quality so as not to endanger the operation of the computer.