User's Manual

Glossary
The header pin-out is as follows:
Pin . . . . . . . . . . . . . Signal Name
1 . . . . . . . . . . . . . . . VCC, power source
2 . . . . . . . . . . . . . . . No Connection
3 . . . . . . . . . . . . . . . IRRX, infrared receive
4 . . . . . . . . . . . . . . . Ground
5 . . . . . . . . . . . . . . . IRTX, infrared transmit
F Memory Module Sockets
The Mainboard provides 168 pin standard DIMM sockets for
installation of 3.3V unbuffered Single or Double Bank SDRAM
modules.
G Parallel Port Connector
The ATX Mainboard provides a parallel port connector. Based
on the ATX standard, a 25-pin parallel port is now built on
the mainboard back panel. This design makes the mainboard
installation easier. The parallel port can be BIOS configured
into standard (SPP) mode, Enhanced Parallel Port (EPP) mode,
and a high speed Extended Capabilities Port (ECP) mode. EPP
Mode requires a driver provided by the peripheral manufacturer
in order to operate properly.
H
Accelerated Graphics Port [AGP] Connector
The Mainboard provides an AGP slot compatible with the
Accelerated Graphics Port specification. AGP compliant video
cards offer a much higher throughput than equivalent PCI bus
video cards. PCI currently only supports a 33MHz bandwidth,
and can transport at peak rates up to 133MB/s over its 32 bit
data bus. AGP operates at a 66MHz bandwidth which enables
a peak rate of 266MB/s in what is known as 'X1' mode. 'X2'
mode has a peak rate of 532MB/S. 'X4' mode has a peak rate
as high as 1.06GB/S. However, the 845 chipset only support
the 1.5V AGP under 4X mode.
Page 45 Mainboard User's Manual