Functional Architecture
S875WP1-E TPS
Revision 4.0
14
3.2.1 AGP
The AGP connector supports the following:
•
4x, 8x AGP 3.0 add-in cards with 0.8 V I/O
•
1x, 4x AGP 2.0 add-in cards with 1.5 V I/O
AGP is a high-performance interface for graphics-intensive applications, such as 3D
applications. While based on the
PCI Local Bus Specification
, Rev. 2.2, 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
NOTES
•
AGP 2x operation is not supported.
•
Install memory in the DIMM sockets prior to installing the AGP video card to avoid
interference with the memory retention mechanism.
•
The AGP connector is keyed for Universal 0.8 V AGP 3.0 cards or 1.5 V AGP 2.0 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.
For information about
Refer to
The AGP connector
Section 5.3
3.2.2 USB
The Intel Server Board S875WP1-E supports up to six USB 2.0 ports, supports Universal Host
Controller Interface (UHCI) and Enhanced Host Controller Interface (EHCI), and uses UHCI-
and EHCI-compatible drivers.
The ICH5-R provides the USB controller for all ports, as shown in Figure 7. The port
arrangement is as follows:
•
Two ports are implemented with stacked back panel connectors, above NIC1
•
Two ports are implemented with stacked back panel connectors, above NIC2
•
Two ports are routed to the front panel USB header