![]() The 3.3V has been used exclusively to power PCI slots - while on-board internal regulator usually makes 3.3V for chipset and CPU, it may be too weak for some PCI boards so in early mainboards it is not routed to slots. Intel Advanced/AS mainboard), the pinout stays the same as shown in the document. KK 254 Solid Header, Vertical, with Friction Lock, 2 Circuits, Tin (Sn) Plating Molex Connector Wire to Board Header 2 Position 2. Descriptions Descriptions of Molex 22-23-2021 provided by its distributors. Downloads Everyone info Install About this app arrowforward Pinouts is the complete collection of common audio / video / lighting / computer and other connector pinouts. Atlantis Socket 5 and similar Socket 7 mainboards). Download datasheets and manufacturer documentation for Molex 22-23-2021. P10 AT aux power supply connector (found on some Dell socket 5, 7 and 8 motherboards). The proprietary 3.3V connector is not only for Dell, but also IBM (especially Power Series) and Intel (e.g. ![]() The two negative rails are bias supplies which only have to provide small amounts of current. That was used primarily to run disk drives, motors, and fans. There are three or four lines dedicated to the 5 volt rail. As a result the PSU delivers most of its wattage at 5 volts. Solderless Terminals Molex Home Connectors Solderless Terminals Solderless Terminals A wide variety of reliable, high-quality solderless solutions that include terminals, splices, quick disconnects and wire management products that meet the interconnect needs of the electrical and industrial markets. In old PCs, almost all of the chips ran directly off of the 5 volt rail.
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