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Power Supplies
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- 1Power SuppliesElectricity from wall outlets is provided in alternating current (AC).
components inside a computer require direct current (DC) power.
Obtain DC power, computers use a power supply. - 2Advanced Technology (AT)Original power supply for legacy computer systems.
- 3AT Extended (ATX)The updated version of the AT
- 4ATX12VMost common power supply.
Includes a second motherboard connector to provide dedicated power to the CPU.
Several versions available. - 5EPS12VOriginally designed for network servers but is now commonly used in high-end desktop models.
- 6ConnectorsThe power supply includes several different connectors.
connectors are used to power various internal components such as the motherboard and disk drives.
Connectors are “keyed” which means that they are designed to be inserted in only one orientation. - 7A 20-PIN or 24-pin slotted connectorConnects to the motherboard.
The 24-pin connector has two rows of 12 pins each.
The 20-pin connector has two rows of 12 pins each. - 8SATA keyed connectorConnects disk drives.
The connector is wider and thinner than Molex connector. - 9Molex keyed connectorConnects hard drives, optical drives, or other devices.
- 10Berg keyed connectorConnect to legacy floppy drives.
Smaller than Molex connector. - 114-pin to 8-pin auxiliary power connectorA connector has two of two to four pins and supplies power to different areas of the motherboards.
The auxiliary power connector is the same shape as the main power connector but smaller. - 126/8-pin PCIe power connectorConnectors have two rows of three to four pins and supply power to internal components.
- 13Power Supply Voltages+12V
Wire Color Yellow
Use
Disk drive motors, fans, cooling devices, and the system bus slots. - 14Power Supply Voltages-12V
Wire Color Blue
Use
Some type of serial port circuits and early programmable read-only memory (PROM) - 15Power Supply Voltages+3.3V
Wire Color Orange
Use
Most newer CPUs.some type of system memory, and AGP video cards. - 16Power Supply Voltages+5V
Wire Color Red
Use
Motherboard, Baby AT and earlier CPUs, and many motherboard components - 17Power Supply Voltages-5V
Wire Color White
Use
ISA bus cards and early PROMS - 18Power Supply Voltages0V
Wire Color Black
Use
Grond-Used to complete circuits with other voltages. - 19NotesPower supplies can also be single rail, dual rail, or multi rail.
- 20RailIs the printed circuit board (PCB) inside the power supply to which the external cables are connected.
- 21single railhas all of the connectors connected to the same PCB.
- 22Multi-raila multi-rail PCB has separate PCBs for each connector.
- 23NoteA computer can tolerate slight fluctuations in power, but a significant deviation can cause the power supply to fail.
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- Fichas sobre Power Supplies, creado por Nazleena Shaariin el 15/03/2018.
- Creado por
- Nazleena Shaariin
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