Agp; Agp Keying Mechanism - Intel D850MVSE Specification

Intel Desktop Board D850MD/D850MV Technical Product Specification

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.
Universal
Connector Key
(All AGP cards have
this cut away)
For information about
The location of the AGP connector
The signal names of the AGP connector
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
The Accelerated Graphics Port Interface Specification
26
AGP 1X/2X or 4X or AGP Pro Card
1.5 Volt
Cards
AGP 2X/4X
Desktop Board
Figure 6. AGP Keying Mechanism
VGA
Connector
3.3 Volt
Cards
AGP 1X/2X
Registration Tab
for AGP Pro cards only
3.3 Volt
1.5 Volt
Universal 1.5 or 3.3 Volt
AGP Pro 1.5
OM12354
Refer to
Figure 1, page 14
Table 39, page 67
Refer to
Section 1.5, page 19