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AGP Bus Connector

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Reference and Sources:

AGP = Accelerated Graphic Port

Accelerated Graphics Port technology improves system performance by providing a high-speed pathway between the PC's graphics controller and system memory. This pathway enables the graphics controller to execute texture maps directly from system memory rather that caching them in its limited local video memory. It also helps speed the flow of decoded video from the CPU to the graphics controller.


AGP advantages:

  • Texture maps of unlimited size, detail, and realism can be employed.
  • 3D applications will also run faster when the need to pre-fetch and cache textures in local video memory is eliminated. How much faster? Up to 12.6 times more frames per second.
  • By minimizing the need for video memory, AGP helps OEMs control the costs of new PC designs.
  • Video traffic will fly seamlessly across the AGP bus to the user's screen.
  • Systems will have more stability when bandwidth-intensive graphics and video traffic is removed from the PCI bus.

PinSignal NamePinSignal Name
A1+12 V dcB1spare
A2spareB2+5 V dc
A3Reserved *B3+5 V dc
A4USB-B4USB+
A5GroundB5Ground
A6INTA#B6INTB#
A7RST#B7CLK
A8GNT#B8REQ#
A9VCC 3.3B9VCC 3.3
A10ST1B10ST0
A11ReservedB11ST2
A12PIPE#B12RBF#
A13GroundB13Ground
A14SpareB14Spare
A15SBA1B15SBA0
A16VCC 3.3B16VCC 3.3
A17SBA3B17SBA2
A18ReservedB18SB_STB
A19GroundB19Ground
A20SBA5B20SBA4
A21SBA7B21SBA6
A22KeyB22Key
A23KeyB23Key
A24KeyB24Key
A25KeyB25Key
A26AD30B26AD31
A27AD28B27AD29
A28VCC 3.3B28VCC 3.3
A29AD26B29AD27
A30AD24B30AD25
A31GroundB31Ground
A32ReservedB32AD STB1
A33C/BE3#B33AD23
A34Vddq 3.3B34Vddq 3.3
A35AD22B35AD21
A36AD20B36AD19
A37GroundB37Ground
A38AD18B38AD17
A39AD16B39C/BE2#
A40Vddq 3.3B40Vddq 3.3
A41FRAME#B41IRDY#
A42SpareB42Spare
A43GroundB43Ground
A44SpareB44Spare
A45VCC 3.3B45VCC 3.3
A46TRDY#B46DEVSEL#
A47STOP#B47Vddq 3.3
A48SpareB48PERR#
A49GroundB49Ground
A50PARB50SERR#
A51AD15B51C/BE1#
A52Vddq 3.3B52Vddq 3.3
A53AD13B53AD14
A54AD11B54AD12
A55GroundB55Ground
A56AD9B56AD10
A57C/BE0#B57AD8
A58Vddq 3.3B58Vddq 3.3
A59ReservedB59AD STB0
A60AD6B60AD7
A61GroundB61Ground
A62AD4B62AD5
A63AD2B63AD3
A64Vddq 3.3B64Vddq 3.3
A65AD0B65AD1
A66SMB1B66SMB0

* This reserved pin should be connected to Ground



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