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ICH4
The primary role of the ICH4 is to provide the gateway to all PC-compatible I/O devices and features.
The mainboard uses the following ICH4 features:
•
32-bit/33 MHz PCI bus interface
•
Low Pin Count (LPC) bus interface
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IDE interface, with ATA-100 capability
•
USB 2.0 interface
•
PC-compatible timer/counter and DMA controllers
•
APIC and 82559 interrupt controller
•
Power management
•
System real-time clock (RTC)
•
General purpose I/O
•
32-bit PCI Bus interface
Firmware Hub
The N82802AC FWH is a high-performance 8 Mbit memory component that provides the nonvolatile
storage of the BIOS. It is connected through the LPC bus from the ICH4.
Video
The mainboard contains two separate, mutually exclusive graphics subsystems. You can use either
the AGP connector or the ATI Rage XL video controller. When an AGP card is installed, the integrated
8 MB video controller is disabled.
AGP Connector
AGP is a high-performance interface for graphics-intensive applications. AGP is independent of the
PCI bus and is intended for exclusive use with graphical display devices. The AGP bus follows the
AGP 3.0 specification.
The AGP connector on the mainboard supports the following:
•
2X, 4X, or 8X AGP protocol
•
AGP Pro50 interface (for a 50 W maximum power draw), using additional power
pins in 4X and 8X mode
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1.5 V add-in cards only
•
USB interface to the AGP connector
•
Maximum bus bandwidth of 2.13 GB/s
NOTES
•
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.
•
AGP Pro50 add-in cards will require removing the plastic spacer at the front of the slot.
14
Features
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