This document discusses various power supply connectors used in PC systems. It describes the main power connectors for AT and ATX power supplies, including the 24-pin ATX connector. Additional connectors covered include the 4-pin and 8-pin ATX 12V connectors for powering the CPU, Molex connectors for peripherals, SATA connectors for hard drives, and 6-pin and 8-pin PCIe connectors for graphics cards. Floppy drive connectors are also briefly mentioned. Diagrams and pinouts are provided for each connector type.
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Presentation (1) (1).pptx
1. TOPIC : VARIOUS POWER SUPPLY CONNECTORS IN
PC-AT
WELCOME TO MY
PRESENTATION
2. SMPS POWER SUPPLY CONNECTORS
• The power supply used in the computer systems
is a Switch Mode Power Supply (SMPS). Generally,
the word “Computer SMPS” is used to refer to a
computer power supply unit. A typical computer
SMPS is shown in the fig.
• The various power supply connectors available
in different computer power supply
• units are clearly explained in this section.
• MOTHER BOARD POWER
CONNECTORS
• Motherboard power connectors are also known
as main power connectors. This connector varies
for AT & ATX power supplies as previously
explained.
3. AT MAIN POWER CONNECTORS
• The AT main power connector is a combination of two separate 6-Pin connectors (P8& P9).
• Note that you must install these connectors to the motherboard in such a way that the black
wires are placed on the centre as shown in the fig. 1otherwise the motherboard will be
damaged.
• . The pin out description for AT main power connector is shown in table
Fig: AT main power
connector
Fig: connecting a AT main power
connector to mother board
5. ATX MAIN POWER CONNECTOR
• Earlier ATX power supply models used a 20-pin configuration for connecting to the
motherboards. But the current standard is a 24-pin configuration.• The pin out
description for ATX 20-pin main power connector is shown in Table
Fig:20-pin ATX main
power connector
Fig: connecting a 20 pin Atx
main power connector to the
mother board
9. ATX 12V POWER CONNECTOR
• It is also called P4 connector. It is a 4-pin connector.
• It was introduced by Intel for Pentium 4 (hence the name P4).
• It plugs into the motherboard and exclusively powers the
processor.
• The pin out description for P4 connector is shown in the table
1.8.4.
Fig:p4 connector Fig : Connecting a P4 connector to
the motherboard
10. Table: pin out description of p4 connector
Eps +12v power connector
It is commonly referred to as EPS12V connector. It is a 8-pin connector.
But as time has passed many CPUs require more 12 volt power and the 8 pin 12 volt connector
is often used instead of a 4 pin 12 volt connector. 4
EPS12V connector and it’s connection details are shown in the fig.
The pin out description for P4 connector is shown in the table
This connector was originally created for workstations to provide 12 volts to power multiple
12. MOLEX CONNECTOR
• It is Also known as peripheral connector
• It is used for connecting various IDE (Integrated Drive
Electronics) devices including floppy drives, hard disks, add-on
fans, extra video card power, supplemental motherboard
power, case lighting etc. The IDE devices are also known as
ATA (AT Attachment) devices.
Fig : molex
connector Table : pin out description of molex
connector
13. SATA CONNECTOR
• SATA was introduced to upgrade the ATA interface (also called
IDE) to a more advanced design. SATA includes both a data
connector and a power connector.
• This connector is shaped so it can only be plugged in the
correct way.
• Modern power supplies will have at least 4 of these, to power
up drives at the SATA standard.
Fig: SATA
15. 6 PIN PCI EXPRESS POWER CONNECTOR
• This connector is used to provide extra 12 volt power to PCI
Express expansion cards.
• PCI Express motherboard slots can provide a maximum of 75
watts. Many video3 cards draw significantly more than 75 watts
so the 6 pin PCI Express power connector was created. These
connectors are also occasionally called “PEG connectors” where
“PEG” stands for PCI Express Graphics.
Fig : 6-pin pci e
connector
Table: pin out description of 6-pin pcie power
connector
16. 8-PIN PCI EXPRESS POWER CONNECTOR
• This connector is just an 8 pin version of the 6 Pin PCI Express
power connector.
• Both are primarily used to provide supplemental power to video
cards.
• The older 6 pin version officially provides a maximum of 75
watts (although unofficially it can usually provide much more)
whereas the new 8 pin version provides a maximum of 150
watts.
Fig:8-pin pcie
power Table: pin out description of 8-pin pcie power connector
17. FLOPPY DRIVE CONNECTOR
• It is also known as FDD connector. It supplies power to floppy
disk drives.
Fig: floppy drive
connector
