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<blockquote data-quote="GSteg" data-source="post: 1384146" data-attributes="member: 543107">The AT PSU is a much older unit that you hardly find on computers nowadays. ATX is the more current and widely used. It&#039;s much easier to find an ATX than an AT at the store.The style of the connecters are also different, but I doubt you&#039;ll be needing to power up a motherboard.The main difference between the two unit is the voltage output itself. The AT is capable of producing: +5v, -5v, +12v, -12v. The ATX can put out the same, except now with +3v, and -3v. It doesn&#039;t matter what you&#039;re going to use because both will have that +12v output for you and connector style will not be as important since most people tend to cut out the connector and solder/crimp the wires.You&#039;ll be using the +12v connection. I dont remember correctly, but I believe there are three wires (same connector that connects to your CD-ROM or hard drive). I&#039;ll need to dig up my old PSU to remember the exact connection, but it&#039;s really easy. I believe there are two black wires and 1 red. Red indicating power and black indicates ground (one or both?).More on this later <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite9" alt=":eek:" title="Eek!&nbsp; &nbsp; :eek:" loading="lazy" data-shortname=":eek:" /></blockquote>

[QUOTE="GSteg, post: 1384146, member: 543107"] The AT PSU is a much older unit that you hardly find on computers nowadays. ATX is the more current and widely used. It's much easier to find an ATX than an AT at the store. The style of the connecters are also different, but I doubt you'll be needing to power up a motherboard. The main difference between the two unit is the voltage output itself. The AT is capable of producing: +5v, -5v, +12v, -12v. The ATX can put out the same, except now with +3v, and -3v. It doesn't matter what you're going to use because both will have that +12v output for you and connector style will not be as important since most people tend to cut out the connector and solder/crimp the wires. You'll be using the +12v connection. I dont remember correctly, but I believe there are three wires (same connector that connects to your CD-ROM or hard drive). I'll need to dig up my old PSU to remember the exact connection, but it's really easy. I believe there are two black wires and 1 red. Red indicating power and black indicates ground (one or both?). More on this later :o [/QUOTE]

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