Get the Latest Tech News Delivered Every Day, ATX 24-Pin 12V Power Connector Pinout (ATX v2.2), More Information on the ATX 24-Pin 12V PSU Connector, Floppy Drive 4-Pin Power Connector Pinout, How to Manually Test a Power Supply With a Multimeter, Molex 4-pin Peripheral Power Connector Pinout, How to Use a Power Supply Tester to Test a PSU, Version 2.2 of the ATX Specification (PDF), -5 VDC (Optional - Removed in ATX12V v2.01). The simplest way is to use a potentiometer (a variable resistor), which will probably limit the amperage of your adjusted voltage to somewhere between 1 and 2 amps (unless you find a really monstrous potentiometer, in which case, please buy me one too). If you need to use a 24-pin power supply connector on a motherboard that only accepts a 20-pin cable, there are a number of online retailers where you can purchase a 24-pin to 20-pin adapter, like this StarTech adapter from Amazon. Stock is running low or out for many items currently, due to covid induced supply chain issues, so don't delay, buy while I still have it in stock! Question Thank you! One thing different though is that my pin #13, is actually brown and orange. It starts with a jerk and then turns off.. What is wrong with that ?

If i thread it through the metal psu cover wont the metal cover short out the 2 posts? Open the PSU; cut the connectors off the wires; drill holes in the existing housing; insert binding posts, switches, etc. +12V1 is rated to 16A and +12V2 is rated to 14A, but the side panel may say that maximum load for both +12V rails is 20A, so even if you wire them together, you're not going to get the 30A that you might have thought). Tried it, the HDD runs for few seconds and stops. Socket: ATX 24 Pin. Very interesting ad very useful, Hey i need to generate 12v 5a from my dell power supply, I am just trying to get enough power to run my laptop, in the end, i cut yellow and black to play around with from the position you have pictures of in step 4, the first pic with the 4 ports, 2 black 2 yellow, only one of each, but this is not working?Please help :) thanks in advance, Reply

That might mean sticking a bundle of wires on your binding post (if you're using option A from Step 1), or it might mean taking connections from the ATX connector and a few molex connectors (if you're using option B). These connectors may have rails of their own ("+12V3" and up), or they may not. !I have a problem, there`s not green cable.And i got blue/white +3.3V and a blue +3.3VS, ¨S¨ means what?.I think the blue/white +3.3V instead the orange?. My friend, your instructable helped me to make a power supply for an Amstrad 6128 (5v and 12v required) that wouldn't start for more than a few seconds. So after doing this, is it possible to run a hard disk (old 4pin socket HDD ) continuously by plugging it to the power supply, so that I can use it as a make-shift grinder ? FREE Delivery on your first order of items shipped by Amazon. If you are planning on connecting to your PSU through the connectors (i.e. 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. I am hoping that the pin-placement is mostly the same, so that you can use the chart from "Step 3" (the one that shows the ATX connector from the pin-side) to figure out what your colors mean. 2.x standard supports 75 watt PCI Express requirements.

5-Volts – Red; 12-Volts – Yellow; Ground – Black (Two wires) I just plan to remove these from my power supply. There is two wires going to the pin. 2 years ago It also gives you more room to add functionality. The ATX type power supplies also have other connectors, used to power up peripherals such as hard disks and DVD drives. Originally the motherboard was powered by one 20-pin connector. The PSU already has an internal fuse or other overload protection, so using fuses mostly enables you to protect whatever you're powering from the PSU's full wrath. Reply +5 VDC Standby Voltage (max 10mA) 500mA or more typical. For some PSUs, the fan is just enough load to get them to power up without the resistor, or they may have a resistor built in. Alternatively, you can use a power supply tester designed to test ATX PSUs, which you can typically buy for around $20 USD online. Image Credit: Please note that the supplied graphical chart is not my work.

If you are adding components inside the PSU's enclosure, be careful to leave enough space for airflow so that the PSU can still cool itself. Thank you to the original poster and more so, now, the comenters.

3 years ago. ATX Pwr Sply not starting up w/green->/black jumper with header plug disconnected from MotherBd (Mobo). This Pwr Sply was just working.

You should also know that a PSU (because it is a "Switched-Mode Power Supply", or SMPS) requires a minimum load in order to provide consistent voltage. From the above page: From 1996-2000, Dell used non standard wire-colors! ), but am currently best a…, Wikipedia's page on the ATX standard (link is pinned to the section on the PSU connector), Great info on load-balancing and rails, as well as a nice page on connectors. Cause the black is the ground.

Some motherboards allow the reverse: to use the older 20-pin power supply cable on a 24-pin motherboard connection.

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