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ATX Power Supplies: An Overview
Intel did away with the AT standard and it's two separate "P8" and "P9" connectors by making the main connection from the power supply to the motherboard a single piece. Enter ATX.
(Article by: Tazz on Mon, Jan-07-2008)
Database of PSU OEMs, websites and UL numbers.

This is a list of manufacturers (or "brands" if they have their own UL) their UL Certification number (if applicable) and a list of brands manufactured by each manufacturer.

I don't expect the list to be "complete," so if you know of any manufacturers, brands or UL numbers I may have missed, please drop me an email at jonny at

Please be able to substantiate any submissions. I appreciate any help, but if you tell me that you have a PSU called "Kung Fu" and you don't know who makes it, don't have a UL for it, etc. I'm afraid I can't use it.

To find a UL listing, look for the "Underwriters Recognized" logo (a backards "R" attached to a "U") and find the "E" plus six digit number underneath it. You can than look this number up on UL's website.

(Article by: Tazz on Sun, Dec-02-2007)

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