Intel Desktop Board D850MD/D850MV Technical Product Specification
26
1.8.1 AGP
✏
NOTE
The AGP connector is keyed for 1.5 V AGP cards only. Do not attempt to install a legacy 3.3 V
AGP card. The AGP connector is not mechanically compatible with legacy 3.3 V AGP cards. See
Figure 6 for more information on the AGP keying mechanism.
The AGP connector supports AGP add-in cards with 1.5 V Switching Voltage Level (SVL). An
AGP Pro50 interface is available (for a 50 W maximum power draw) as a manufacturing option.
Legacy 3.3 V AGP cards are not supported and will prevent the system from booting if installed.
OM12354
AGP Pro 1.5
Universal 1.5 or 3.3 Volt
1.5 Volt
3.3 Volt
Registration Tab
for AGP Pro cards only
VGA
Connector
Universal
Connector Key
(All AGP cards have
this cut away)
1.5 Volt
Cards
AGP 2X/4X
3.3 Volt
Cards
AGP 1X/2X
AGP 1X/2X or 4X or AGP Pro Card
Desktop Board
Figure 6. AGP Keying Mechanism
For information about Refer to
The location of the AGP connector Figure 1, page 14
The signal names of the AGP connector Table 39, page 67
AGP is a high-performance interface for graphics-intensive applications, such as 3-D applications.
While based on the PCI Local Bus Specification, Rev. 2.1, AGP is independent of the PCI bus and
is intended for exclusive use with graphical display devices. AGP overcomes certain limitations of
the PCI bus related to handling large amounts of graphics data with the following features:
• Pipelined memory read and write operations that hide memory access latency
• Demultiplexing of address and data on the bus for nearly 100 percent efficiency
For information about Refer to
The
Accelerated Graphics Port Interface Specification
Section 1.5, page 19
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