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Introducing the Motherboard
Chapter 1
Introducing the Motherboard
Introduction
Thank you for choosing the 915P-A motherboard. This motherboard is a high perfor-
mance, enhanced function motherboard that supports LGA775 Pentium 4 processors for
high-end business or personal desktop markets.
The motherboard incorporates the 915-P Northbridge (NB) and ICH6 Southbridge (SB)
chipsets. The Northbridge supports a Front Side Bus (FSB) frequency of 800/533 MHz using
a scalable FSB Vcc_CPU. The momory controller supports DDR memory DIMM frequen-
cies of 333MHz and 400 MHz or DDR2 memory DIMM frequencies of 400 MHz and 533
MHz. It supports four DDR Sockets with up to maximum memory of 2 GB. DDR Maximum
memory bandwidth of 3.2 GB/s in single-channel is supported, or 8.5 GB/s in dual-channel
interleaved mode assuming DDR2 533MHz. Aside from the onboard AGP Express, one 16-
lane PCI Express slot, intended for Graphics Interface, is fully compliant to the PCI
Express Base Specification revision 1.0a.
The ICH6 Southbridge supports two PCI slots which are PCI 2.3 compliant. In addition, two
PCI Express x1 slots are supported, fully compliant to the PCI Express Base Specification,
Revision 1.0a. It implements an EHCI compliant interface that provides 480Mb/s band-
width for eight USB 2.0 ports, integrates Azalia codec supporting Azilia standard that
features a 8-channels High Definition Audio output. One onboard IDE connector supports
2 IDE devices in ATA-100/66 mode. The Southbridge integrates a Serial ATA host controller
that is SATA v1.0 compliant, supporting four SATA ports with maximum transfer rate up to
150 MB/s each.
The 915P-A motherboard is equipped with advanced full set of I/O ports in the rear panel,
including PS/2 mouse and keyboard connectors, COM1, LPT1, four USB ports, one op-
tional LAN port, and audio jacks for microphone, line-in and 8-ch line out.
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