Pc PinOuts EasyPCOnline

Personal Computer
(PC) Connectors Pin
Outs
and Pin Diagrams
EasyPCOnline
Presented / Edited by
Neil Farley
www.easypconline.com
Plymouth, Devon, UK
Version 2.0
28th April 2011
Visit us on http://www.fb.com/epconline

Table of Contents
28/04/2011 ©Easy PC Online
Introduction 4
Changes 5
ATX 20/24-pin Power Supply Connector 6
IDE/PATA Power Supply Connector 7
SATA Power Supply Connector 8
IDE/PATA Connector 9
IDE/PATA Pinouts 10
SATA Connector 11
Floppy Disk Drive Connector 12
Floppy Disk Drive pinouts 13
CPU and System FAN Connector 14
PCI General description 15
PCI Connectors 16
PCI Pinouts 17
PCI Connection / Additional info 18
PCI Connectors 19
PCIe (PCI Express) Description 20
PCIe (PCI Express) Pinouts 21
AGP Connectors 22
AGP Pinouts 23
PS/2 Mouse/Keyboard Connectors 24

Table of Contents
28/04/2011 ©Easy PC Online
Parallel Port / LPT Connector 25
Serial or COM Port Description 26
Serial or COM Pinout 27
VGA Pinout 28
DVI Description and Connector 29
DVI Pinout 30
DVI to VGA Circuit and DVI type Connectors 31
S-Video Description 32
S-Video Pinouts 33
HDMI Connectors 34
HDMI Pinouts and Version table 35
USB 2.0 Pinouts 36
USB 3.0 Pinout and Connectors 37
Ethernet/LAN: RJ-45 Connector & Pinout 38
eSATAp Connector Pinout 39
Game/Joystick/MIDI Port Pinout 40
Firewire or IEEE-1394 Connector 41
Sound / Motherboard Rear Connections 42
Microphone Connector and Pre-amp Circuits 43
Abbreviations 44
References 45

Introduction
Introduction
Hello, welcome to the PC Connectors Pin-Outs ebook. The majority of
the common PC pin-outs are contained within this ebook with a vast
selection of photos/images.
The purpose of this book is to contain a set of PC connections in one
place as a quick guide as online connections are not always accessable.
This eBook has grown from a purely textual document to an illustrated
guide with the additional of new interfaces as they become available.
Additional information or specific pinouts for other computers are
available from Wiki’s or other online sources.
28/04/2011 ©Easy PC Online Return to Contents Page 4

Changes
Changes
28-04-2011, Version 2.0: New formatting.
27-04-2011, Version 1.2: PCI, PCIe, AGP Pinouts added for completeness.
20-09-2010, Version 1.1: Update to fix some font issues.
10-01-2010, Version 1.0: Original Publish.
10-08-2009, Version 0.5: Added lots of graphics to replace text tables
and pinouts.
10-01-2010, Version 0.2: Initial edited document.

ATX 20/24-pin Power
Supply Connector
ATX 20/24-pin Power Supply Connector
The ATX specification requires the power supply to produce three
main outputs, +3.3 V, +5 V and +12 V. Low-power -12 V and 5 VSB
(standby) supplies are also required. A -5 V output was originally
required, but it is now completely obsolete.
Originally the motherboard was powered by one 20-pin connector. An
ATX power supply provides a number of peripheral power connectors,
and (in modern systems) two connectors for the motherboard: a 4-pin
auxiliary connector providing additional power to the CPU, and a main
24-pin power supply connector, an extension of the original 20-pin
version.
See figure 1 for 24-pin ATX power connector.
Pins 8, 13, and 16 (shaded) are
control signals, not power:
"Power On" is pulled up to +5V by
the PSU, and must be driven low
to turn on the PSU.
"Power good" is low when other
outputs have not yet reached, or
are about to leave, correct
voltages.
The "+3.3 V sense" line is for
remote sensing.[7]
Pin 20 (formerly −5V, white wire)
is absent in current power
supplies; it was optional in ATX
and ATX12V ver. 1.2, and deleted
as of ver. 1.3.
The right-hand pins are
numbered 11–20 in the 20-pin
version.

IDE/PATA Power Supply
Connector
IDE/PATA Power Supply Connector

SATA Power Supply
Connector
SATA Power Supply Connector
Notes:
1. Pins 3, 7, 13 are pre-charge. Pin11 may be used for other purposes than
GND.
2. Pins 1, 2, and 3 are optional as well, as evidenced by some adapter
Cables that connect the drives to older PSUs. These are usually Y-
Adapters that have the four-pin drive connector on the other end.

IDE/PATA Connector
IDE/PATA Connector

IDE/PATA Pinouts
IDE/PATA Pinouts

SATA Connector
SATA Connector
The SATA standard defines a data cable with seven conductors (3 grounds and 4
active data lines in two pairs) and 8 mm wide wafer connectors on each end.
SATA cables can have lengths up to 1 metre (3.3 ft), and connect one
motherboard socket to one hard drive. PATA ribbon cables, in comparison,
connect one motherboard socket to one or two hard drives, carry either 40 or 80
wires, and are limited to 45 centimetres (18 in) in length by the PATA
specification (however, cables up to 90 centimetres (35 in) are readily available).
Thus, SATA connectors and cables are easier to fit in closed spaces, and reduce
obstructions to air cooling. They are more susceptible to accidental unplugging
and breakage than PATA, but cables can be purchased that have a locking
feature, whereby a small (usually metal) spring holds the plug in the socket.

Floppy Disk Drive
Connector
Floppy Disk Drive Connector
The Floppy cable twist is used to determine which drive [in a multi-
drive] system is drive 'A' or 'B' [also called drive '1' or '2']. From the pin
out table below; the swapped pins determine the floppy drive enabled,
and which motor is enabled. The pins are line 10, line 12, line 14, and
line 16, while the other lines in the twist are ground lines. In general, the
Floppy drive ships with a jumper positioned so that the drive is a 'B'
drive, the cable does the rest. There may be other variations [dual twist]
in the cable, this page explores one "common" implementation.

Floppy Disk Drive
pinouts
Floppy Disk Drive pinouts

CPU and System FAN
Connector
CPU and System FAN Connector
1. Chassis and CPU fans may use either3-pin or 4-pin power connectors.
2. Pin connectors are usually used for the smaller chassis fans with lower
power consumption. 4-pin connectors are usually used by CPU fans with
higher power consumption. Fans and on-board fan headers are
backwards compatible.
3. When using a 3-pin power connector with a 4-pin fan header, the fan
will always be on; there is no fan control.
Proper fan connector placement is shown in the figures below:
• Fan has a 3-pin power connector; desktop board has a 4-pin fan
header:
• Fan has a 4-pin power connector; desktop board has a 3-pin fan
header:

PCI General description
PCI General description
Conventional PCI (PCI is an initialism formed from Peripheral Component
Interconnect, part of the PCI Local Bus standard and often shortened to PCI) is a
computer bus for attaching hardware devices in a computer. These devices can
take either the form of an integrated circuit fitted onto the motherboard itself,
called a planar device in the PCI specification, or an expansion card that fits into a
slot. The PCI Local Bus is common in modern PCs, where it has displaced ISA and
VESA Local Bus as the standard expansion bus, and it also appears in many other
computer types. Despite the availability of faster interfaces such as PCI-X and PCI
Express, conventional PCI remains a very common interface.
The PCI specification covers the physical size of the bus (including the size and
spacing of the circuit board edge electrical contacts), electrical characteristics, bus
timing, and protocols. The specification can be purchased from the PCI Special
Interest Group (PCI-SIG).
Typical PCI cards used in PCs include: network cards, sound cards, modems, extra
ports such as USB or serial, TV tuner cards and disk controllers. Historically video
cards were typically PCI devices, but growing bandwidth requirements soon
outgrew the capabilities of PCI. PCI video cards remain available for supporting
extra monitors and upgrading PCs that do not have any AGP or PCI Express slots.
Many devices traditionally provided on expansion cards are now commonly
integrated onto the motherboard itself, meaning that modern PCs often have no
cards fitted. However, PCI is still used for certain specialized cards, although many
tasks traditionally performed by expansion cards may now be performed equally
well by USB devices.

PCI Connectors
PCI Connectors

PCI Pinouts
PCI Pinouts
Most lines are connected to each slot in parallel. The exceptions are:
Each slot has its own REQ# output to, and GNT# input from the motherboard arbiter.
Each slot has its own IDSEL line, usually connected to a specific AD line.
TDO is daisy-chained to the following slot's TDI. Cards without JTAG support must connect TDI to TDO so as not to break the chain.
PRSNT1# and PRSNT2# for each slot have their own pull-up resistors on the motherboard. The motherboard may (but does not have to)
sense these pins to determine the presence of PCI cards and their power requirements.
REQ64# and ACK64# are individually pulled up on 32-bit only slots.
The interrupt lines INTA# through INTD# are connected to all slots in different orders. (INTA# on one slot is INTB# on the next and INTC#
on the one after that.)

PCI Connection /
Additional info
PCI Connection / Additional info
64-bit PCI extends this by an additional 32 contacts on each side which
provide AD[63:32], C/BE[7:4]#, the PAR64 parity signal, and a number of
power and ground pins.
IOPWR is +3.3V or +5V, depending on the backplane. The slots also have a ridge in one of two places
which prevents insertion of cards that do not have the corresponding key notch, indicating support for
that voltage standard. Universal cards have both key notches and use IOPWR to determine their I/O
signal levels.
The PCI SIG strongly encourages 3.3 V PCI signalling, requiring support for it since standard revision
2.3, but most PC motherboards use the 5 V variant. Thus, while many currently available PCI cards
support both, and have two key notches to indicate that, there are still a large number of 5 V-only
cards on the market.
The M66EN pin is an additional ground on 5V PCI busses found in most PC motherboards. Cards and
motherboards that do not support 66 MHz operation also ground this pin. If all participants support 66
MHz operation, a pull-up resistor on the motherboard raises this signal high and 66 MHz operation is
enabled.
At least one of PRSNT1# and PRSNT2# must be grounded by the card. The combination chosen
indicates the total power requirements of the card (25 W, 15 W, or 7.5 W).
SBO# and SDONE are signals from a cache controller to the current target. They are not initiator
outputs, but are coloured that way because they are target inputs.

PCI Connectors
PCI Connectors

PCIe (PCI Express)
Description
PCIe (PCI Express) Description
PCI Express (Peripheral Component Interconnect Express), officially abbreviated as
PCIe, is a computer expansion card standard designed to replace the older PCI,
PCI-X, and AGP bus standards. PCIe has numerous improvements over the
aforementioned bus standards, including higher maximum system bus throughput,
lower I/O pin count and smaller physical footprint, better performance-scaling for
bus devices, a more detailed error detection and reporting mechanism, and native
hot plugging. More recent revisions of the PCIe standard support hardware I/O
virtualization.
The PCIe electrical interface is also used in a variety of other standards, most
notably ExpressCard, a laptop expansion card interface.
Format specifications are maintained and developed by the PCI-SIG (PCI Special
Interest Group), a group of more than 900 companies that also maintain the
Conventional PCI specifications. PCIe 3.0 is the latest standard for expansion cards
that is available on mainstream personal computers.
Applications
PCI Express is used in consumer, server, and industrial applications, as a
motherboard-level interconnect (to link motherboard-mounted peripherals) and
as an expansion card interface for add-in boards.
In virtually all modern PCs, from consumer laptops and desktops to enterprise data
servers, the PCIe bus serves as the primary motherboard-level interconnect,
connecting the host system processor with both integrated-peripherals (surface
mounted ICs) and add-on peripherals (expansion cards.) In most of these systems,
the PCIe bus co-exists with one or more legacy PCI busses, for backward
compatibility with the large body of existing PCI peripherals.

PCIe (PCI Express)
Pinouts
PCIe (PCI Express) Pinouts
An ×1 slot is a shorter version of this, ending after
pin 18. ×8 and ×16 slots extend the pattern.

AGP Connectors
AGP Connectors

AGP Pinouts
AGP Pinouts

PS/2 Mouse/Keyboard
Connectors
PS/2 Mouse/Keyboard Connectors

Parallel Port / LPT
Connector
Parallel Port / LPT Connector

Serial or COM Port
Description
Serial or COM Port Description
In computing, a serial port is a serial communication physical interface
through which information transfers in or out one bit at a time (contrast
parallel port). Throughout most of the history of personal computers, data
transfer through serial ports connected the computer to devices such as
terminals and various peripherals.
While the RS-232 standard originally specified a 25-pin D-type connector,
many designers of personal computers chose to implement only a subset
of the full standard: they traded off compatibility with the standard
against the use of less costly and more compact connectors (in particular
the DE-9 version used by the original IBM PC-AT). The desire to supply
serial interface cards with two ports required that IBM reduce the size of
the connector to fit onto a single card back panel. A DE-9 connector also
fits onto a card with a second DB-25 connector that was similarly changed
from the original Centronics-style connector. Starting around the time of
the introduction of the IBM PC-AT, serial ports were commonly built with a
9-pin connector to save cost and space. However, presence of a 9-pin D-
subminiature connector is neither necessary nor sufficient to indicate use
of a serial port, since this connector was also used for video, joysticks, and
other purposes.

Serial or COM Pinout
Serial or COM Pinout

VGA Pinout
VGA Pinout
A Video Graphics Array (VGA) connector is a three-row 15-pin DE-15
connector. The 15-pin VGA connector is found on many video cards,
computer monitors, and some high definition television sets. On laptop
computers or other small devices, a mini-VGA port is sometimes used in
place of the full-sized VGA connector.
DE-15 is also conventionally called RGB connector, D-sub 15, mini sub D15,
mini D15, DB-15, HDB-15, HD-15 or HD15 (High Density, to distinguish it
from the older and less flexible DE-9 connector used on older VGA cards,
which has the same shell size but only two rows of pins).

DVI Description and
Connector
DVI Description and Connector
The Digital Visual Interface (DVI) is a video interface standard covering the
transmission of video between a source device (such as a personal
computer) and a display device. The DVI standard has achieved
widespread acceptance in the PC industry, both in desktop PCs and
monitors. Most contemporary retail desktop PCs and LCD monitors feature
a DVI interface, and many other devices (such as projectors and consumer
televisions) support DVI indirectly through HDMI, another video interface
standard. Most laptops still have legacy VGA and, in some models, HDMI
ports, but not displayport or DVI.
DVI was developed by an industry consortium, the Digital Display Working
Group (DDWG) to replace the "legacy analog technology" VGA connector
standard. It is designed for carrying uncompressed digital video data to a
display. It is partially compatible with the High-Definition Multimedia
Interface (HDMI) standard in digital mode (DVI-D), and VGA in analog
mode (DVI-A). It is also still found in some consumer television sets,
despite having been superseded in this application by HDMI, another
video interface standard.

DVI Pinout
DVI Pinout

DVI to VGA Circuit and
DVI type Connectors
DVI to VGA Circuit and DVI type Connectors

S-Video Description
S-Video Description
Separate Video, more commonly known as S-Video and Y/C, and still
often referred to by JVC (who introduced the DIN-connector pictured) as
both an S-VHS connector and as Super Video is an analog video
transmission scheme, in which video information is encoded on two
channels: luma (luminance, intensity) and chroma (color). This is in
contrast with lower-quality composite video, in which video information
is encoded on one channel, and higher-quality component video, in
which video information is encoded on three channels. S-Video carries
standard definition video (typically at 480i or 576i resolution), but does
not carry audio on the same cable.
The 4-pin mini-DIN connector (overleaf) is the most common of several
S-Video connector types. Other S-Video connector variants include 7-pin
locking "dub" connectors used on many professional S-VHS machines,
and dual "Y" and "C" BNC connectors, often used for S-Video patch bays.
Early Y/C video monitors often used RCA connectors that were
switchable between Y/C and composite video input. Though the
connectors are different, the Y/C signals for all types are compatible.

S-Video Pinouts
S-Video Pinouts
Female 4-pin
connector
7-pin mini-DIN
female connector
found in Laptops

HDMI Connectors
HDMI Connectors
HDMI (High-Definition Multimedia Interface) is a compact audio/video
interface for transmitting uncompressed digital data. It is a digital
alternative to consumer analog standards, such as radio frequency (RF)
coaxial cable, composite video, S-Video, SCART, component video, D-
Terminal, or VGA. HDMI connects digital audio/video sources (such as
set-top boxes, upconvert DVD players, HD DVD players, Blu-ray Disc
players, AVCHD camcorders, personal computers (PCs), video game
consoles such as the PlayStation 3 and Xbox 360, and AV receivers) to
compatible digital audio devices, computer monitors, video projectors,
and digital televisions.

HDMI Pinouts and
Version table
HDMI Pinouts and Version table

USB 2.0 Pinouts
USB 2.0 Pinouts
Host interface (USB 1.x/2.0)
Cable plugs (USB 1.x/2.0)

USB 3.0 Pinout and
Connectors
USB 3.0 Pinout and Connectors

Ethernet/LAN: RJ-45
Connector & Pinout
Ethernet/LAN: RJ-45 Connector & Pinout
1

eSATAp Connector Pinout
eSATAp Connector Pinout
eSATAp (power over eSATA) is a high speed connection for External
storage devices. External storage devices includes portable hard disks
(HDD), solid-state drives (SSD) and network-attached storage (NAS).
eSATAp port can be found on notebook PCs and desktop machines.
An eSATAp (Power over eSATA or eSATA/USB) port is backward
compatible with eSATA and USB devices. Notebooks/motherboards
manufacturers with eSATAp port includes Dell, Gigabyte Technology,
Sony, Toshiba, Lenovo, HP, MSI, Acer and Asus.
28/04/2011 ©Easy PC Online Page 39

Game/Joystick/MIDI Port
Pinout
Game/Joystick/MIDI Port Pinout
The game port was the traditional connector for video game input
devices on x86-based PCs. Since about 1990, the game port has usually
been integrated with a PC I/O or sound card, either ISA or PCI, or as an
on-board feature of some motherboards; before that, it was usually on a
dedicated ISA card. Microsoft has discontinued game port support with
Windows Vista,[1] so it is probable that manufacturers will cease to
produce boards with this connector. However, it's still entirely possible
to provide third-party drivers that will work with the game port, and
some companies that have produced game port cards in the past do so.
USB adapters that allow gameport controllers to work have also been
available.

Firewire or IEEE-1394
Connector
Firewire or IEEE-1394 Connector

Sound / Motherboard
Rear Connections
Sound / Motherboard Rear Connections

Microphone Connector
and Pre-amp Circuits
Microphone Connector and Pre-amp Circuits
http://www.tkk.fi/Misc/Electronics/circuits/micamp.html
Electret Microphone Pre-amplifier Circuits

Abbreviations
• ATA: Advanced Technology Attachment
• ATX: Advanced Technology Extended
• DVI: Digital Visual Interface
• eSATA: External Serial Advanced Technology Attachment
• HDMI: High Definition Multimedia Interface
• IEEE: Institute of Electrical and Electronic Engineers
• IDE: Integrated Drive Electronics
• PCI: Peripheral Component Interface
• SATA: Serial Advanced Technology Attachment
• USB: Universal Serial Bus
• VGA: Video Graphics Adapter

References
References
Wikipedia http://en.wikipedia.org/wiki/Main_Page
Allpinouts http://www.allpinouts.org/
Pinouts.ru http://pinouts.ru/
The author assumes no responsibility for errors. Use of any term, circuit or information in this
document should not be regarded as affecting the validity of any registered trademark,
trademark or service mark. All trademarks are acknowledged to be the property of their
respective owners.

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