PC Video Bus, AGP Slot Pinout Version 2.0


The pin out table below provides the Pinout for the AGP bus slot on the personal computer. The pinouts listed account for version 2.0 of the specification. The table lists 132 pins [2 rows of 66 pins], but the Key which is listed is an absence of pins [space], both the Motherboard slot connector and AGP card have 124 pins. The table below lists pinouts for a 3.3 volt connector; 1x and 2x boards, a Universal connector; 1x, 2x, or 4x boards, and a 1.5 volt connector; 1x, 2x and 4x 1.5v boards.

Refer to this page for Version 3.0 of the AGP specification; 8x pinout at 1.5 volts, with new Key locations. Revision 3 of the AGP standard replaced this version [2.0], Revision 3 increased the speed of the AGP bus from 4x to 8x.

The AGP bus connector is 2.9 inches long. The number sign in the pinout table below indicates the signal’s asserted state occurs when it is at a low voltage. The absence of a # symbol indicates that the signal is asserted at a high voltage. The standard Printed Wiring board width is .062.





AGP Bus Pin Out, Version 2.0
Accelerated Graphics Port
124 Pin Edge Connector
 
3.3 Volt Boards
Universal Boards
1.5 Volt Boards
Pin # Side A Side B Side A Side B Side A Side B
1 +12V OVRCNT# +12V OVRCNT# +12V OVRCNT#
2 TYPEDET# +5.0V TYPEDET# +5.0V TYPEDET# +5.0V
3 Reserved 5.0V Reserved 5.0V Reserved 5.0V
4 USB- USB+ USB- USB+ USB- USB+
5 Ground Ground Ground Ground Ground Ground
6 INTA# INTB# INTA# INTB# INTA# INTB#
7 RST# CLK RST# CLK RST# CLK
8 GNT# REQ# GNT# REQ# GNT# REQ#
9 VCC 3.3 VCC 3.3 VCC 3.3 VCC 3.3 VCC 3.3 VCC 3.3
10 ST1 ST0 ST1 ST0 ST1 ST0
11 Reserved ST2 Reserved ST2 Reserved ST2
12 PIPE# RBF# PIPE# RBF# PIPE# RBF#
13 Ground Ground Ground Ground Ground Ground
14 Reserved Reserved WBF# Reserved WBF# Reserved
15 SBA1 SBA0 SBA1 SBA0 SBA1 SBA0
16 VCC 3.3 VCC 3.3 VCC 3.3 VCC 3.3 VCC 3.3 VCC 3.3
17 SBA3 SBA2 SBA3 SBA2 SBA3 SBA2
18 Reserved SB_STB SB_STB# SB_STB SB_STB# SB_STB
19 Ground Ground Ground Ground Ground Ground
20 SBA5 SBA4 SBA5 SBA4 SBA5 SBA4
21 SBA7 SBA6 SBA7 SBA6 SBA7 SBA6
22 Key Key Reserved Reserved Reserved Reserved
23 Key Key GROUND GROUND GROUND GROUND
24 Key Key Reserved 3.3Vaux Reserved 3.3Vaux
25 Key Key Vcc 3.3 Vcc 3.3 Vcc 3.3 Vcc 3.3
26 AD30 AD31 AD30 AD31 AD30 AD31
27 AD28 AD29 AD28 AD29 AD28 AD29
28 VCC 3.3 VCC 3.3 VCC 3.3 VCC 3.3 VCC 3.3 VCC 3.3
29 AD26 AD27 AD26 AD27 AD26 AD27
30 AD24 AD25 AD24 AD25 AD24 AD25
31 Ground Ground Ground Ground Ground Ground
32 Reserved AD STB1 AD STB1# AD STB1 AD STB1# AD STB1
33 C/BE3# AD23 C/BE3# AD23 C/BE3# AD23
34 Vddq 3.3 Vddq 3.3 Vddq Vddq Vddq 1.5 Vddq 1.5
35 AD22 AD21 AD22 AD21 AD22 AD21
36 AD20 AD19 AD20 AD19 AD20 AD19
37 Ground Ground Ground Ground Ground Ground
38 AD18 AD17 AD18 AD17 AD18 AD17
39 AD16 C/BE2# AD16 C/BE2# AD16 C/BE2#
40 Vddq 3.3 Vddq 3.3 Vddq Vddq Vddq 1.5 Vddq 1.5
41 FRAME# IRDY# FRAME# IRDY# FRAME# IRDY#
42 Reserved 3.3Vaux Reserved 3.3Vaux KEY KEY
43 Ground Ground Ground Ground KEY KEY
44 Reserved Reserved Reserved Reserved KEY KEY
45 VCC 3.3 VCC 3.3 VCC 3.3 VCC 3.3 KEY KEY
46 TRDY# DEVSEL# TRDY# DEVSEL# TRDY# DEVSEL#
47 STOP# Vddq 3.3 STOP# Vddq STOP# Vddq 1.5
48 PME# PERR# PME# PERR# PME# PERR#
49 Ground Ground Ground Ground Ground Ground
50 PAR SERR# PAR SERR# PAR SERR#
51 AD15 C/BE1# AD15 C/BE1# AD15 C/BE1#
52 Vddq 3.3 Vddq 3.3 Vddq Vddq Vddq 1.5 Vddq 1.5
53 AD13 AD14 AD13 AD14 AD13 AD14
54 AD11 AD12 AD11 AD12 AD11 AD12
55 Ground Ground Ground Ground Ground Ground
56 AD9 AD10 AD9 AD10 AD9 AD10
57 C/BE0# AD8 C/BE0# AD8 C/BE0# AD8
58 Vddq 3.3 Vddq 3.3 Vddq Vddq Vddq 1.5 Vddq 1.5
59 Reserved AD STB0 Reserved AD STB0# Reserved AD STB0#
60 AD6 AD7 AD6 AD7 AD6 AD7
61 Ground Ground Ground Ground Ground Ground
A62 AD4 AD5 AD4 AD5 AD4 AD5
63 AD2 AD3 AD2 AD3 AD2 AD3
64 Vddq 3.3 Vddq 3.3 Vddq Vddq Vddq 1.5 Vddq 1.5
65 AD0 AD1 AD0 AD1 AD0 AD1
66 Reserved Reserved Vrefcg Vrefcg Vrefcg Vrefcg




AGP [Accelerated Graphics Port] is a Point-to-Point [Chip-to-Chip] bus using 1.5 Volt or 3.3V signaling. The main use of the AGP bus is as a Local Video bus in IBM compatible Personal Computers [PCs]. The AGP bus is based on the PCI [Peripheral Component Interface] spec, using the PCI specification as an operational baseline. So the pinout is similar between the AGP and PCI buses. The AGP specification adds 20 additional signals not included in the PCI bus. The AGP specification defines the Protocol, Electrical and Mechanical aspects of the bus. The AGP bus is used as a local video bus in Personal Computers [PCs].

The Mechanical definitions include a connector and Add-in card [AGP Board]. The Board sizes and 1.5v and 3.3v connectors are also defined with in the spec.
There are five connectors defined: AGP 3.3v, AGP 1.5v, AGP Universal, AGP Pro Universal, AGP Pro 3.3v, and AGP Pro 1.5v. PCI and AGP boards are not mechanically interchangeable.
Note: On the newest Motherboards the AGP Slot is being replaced by the PCI-Express Bus (which is not mechanically interchangeable with the AGP slot).
Really the AGP slots have been replaced, with few if any main-boards supporting the out-dated AGP standard.





AGP Version 2.0 Video Card
AGP video card, Revision 2.0

Additional computer bus descriptions and pinout information may be found by selecting the Buses icon below.
The main Accelerated Graphics Port [AGP] Bus page.

Navigation: Engineering Home > Interface Buses > Personal Computer Buses > AGP Bus > Version 2.



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Modified 6/13/15
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