Atx Wire Diagram

I m not the author.

Atx wire diagram. First used in home appliances other industries soon began designing it into their products from. The wiring diagrams above show a 10w 10 ohm dummy load resistor on the 5v rail installed between a black wire gnd and a red wire 5v. These diagrams reflect the front view. This wire should be connected to either an orange wire 3 3v or a red wire 5v for the power supply to function.

In addition to the old at standard atx 2 0 has one extra voltage line available 3 3v a connector chain lined to the single 20 pin and a power on wire that allows software to turn off the psu. Step 1 some background information and suggestions for projects step 2 a list of standard wire colors and functions in an atx psu step 3 a chart of wire associations on atx connectors step 4 a chart of wire associations on other connectors molex floppy pci e power etc step 5 tips tricks warnings anomalies and. Atx specification includes not only power supply unit but also interface to case and motherboard. The original atx standard supported a 20 pin connector with a very similar pinout as the 24 pin connector but with pins 11 12 23 and 24 omitted.

The colors in this chart represent recommended wire colors in the psu cables. This means that the newer 24 pin power supply is useful for motherboards that require more power and therefore eliminates the need for atx 12v power supplies to provide an auxiliary power cable. When in doubt try the lower voltage first 3 3v. Molex connector is the vernacular term for a two piece pin and socket interconnection.

Bestec atx 250 12z wiring diagram. See the pinout diagram to the right. If it doesn t work on first try reverse the two wires and all should be well. A power supply unit or psu converts mains ac to low voltage regulated dc power for the internal components of a computer.

Molex developed and patented the first examples of this connector style in the late 1950s and early 1960s. Mar 2 i have acquired a bestec atx 12z and thought i would start a new thread just for. To provide the additional wattage the old part has been replaced by a new 24 pin p1. The author is noted usually directly in the schematic.

So i decided to look at the circuit and here is the schematic. Modern personal computers universally use switched mode power supplies some power supplies have a manual switch for selecting input voltage while others automatically adapt to the mains voltage. If a power supply is non atx or at compliant it may have its own color scheme. On this page i collect the schematics of switching supplies for computers smps atx v 1 0 atx v 2 0 and some at which i found on internet.

At and atx pc computer supplies schematics. One of the important things to do when converting an atx power supply is to include a. Download bestec atx 250 12z wiring diagram. Most modern desktop personal computer power supplies conform to the atx.

To install the dummy load resistor on the 12v rail place it between a black wire gnd and a yellow wire 12v.