Well, under certain conditions a new PSU can still be used with an old PC and vise versa- see our guide on connecting 20-pin PSU to 24-pin motherboard. People often want to know what to do if there is a mismatch. The old socket was 39-01-2200 and the mating header was 39-29-9202. Mating motherboard header is Molex 44206-0007. The colors are shown here just for reference (you won't see them from the front). The colors in this chart represent recommended wire colors in the PSU cables. Accordingly, different ATX-style PSU may use different number of power wires: see the pinout diagram to the right. To provide the additional wattage, the old part has been replaced by a new 24-pin P1. When PCI Express® bus was introduced, PCIe cards needed up to 75W extra. The original ATX systems had 20-pin main connector P1. 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.Standard ATX power supplies typically have the main power connector P1, additional 12V connectors, as well as peripheral, floppy drive, serial ATA, and PCI Express® receptacles, which we will describe below.įor the operation basics of SMPS PSU see our power supply tutorial. Intel Advanced/AS mainboard), the pinout stays the same as shown in the document. Atlantis Socket 5 and similar Socket 7 mainboards). 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. In old PCs, almost all of the chips ran directly off of the 5 volt rail.
0 kommentar(er)
