Intel Desktop Board DP45SG Technical Product Specification

1.6 Intel

P45 Chipset

The Intel P45 chipset consists of the following devices:

• Intel 82P45 Memory Controller Hub (MCH) with Direct Media Interface (DMI)

interconnect

• Intel 82801JR I/O Controller Hub (ICH10R)

The MCH component provides interfaces to the processor, memory, and PCI Express.

The ICH10R is a centralized controller for the board’s I/O paths.

For information about Refer to

The Intel P45 chipset http://www.intel.com/products/desktop/chipsets/index.htm

Resources used by the chipset Chapter 2

1.6.1 PCI Express x16 Graphics

The MCH supports two add-in discrete graphics card via the PCI Express 2.0 graphics

connector:

• One Primary PCI Express 2.0 x16 (electrical x16 or x8) bus add-in card connector.

The x16 interface supports simultaneous (full duplex) transfers up to 16

GBytes/sec when operating in x16 mode with a compatible PCI Express 2.0 x16

discrete graphics card. Backwards compatible with PCI Express 1.1 x16, supporting

a maximum theoretical bandwidth of 8 GB/s. Interface will operate in x16 mode

only if the secondary PCI Express x16 connector is not populated.

• One Secondary PCI Express 2.0 x16 (electrical x8) bus add-in card connector: The

board provides a PCI Express add-in card connector in the form of a physical x16

connector with electrical routing of x8. This connector is an electrical equivalent of

a PCI Express x8 bus add-in card connector. This connector also supports x4 and

x1 PCI Express add-in cards. This interface supports PCI Express 2.0 bandwidth

when used with a compatible PCI Express 2.0 x16 discrete graphics card.

For information about Refer to

PCI Express technology http://www.pcisig.com