Acer 12000 Manuel de l'utilisateur

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System Board

1.1

Features

The M21A is a dual-processor system board built on an extended ATX

baseboard utilizing two Intel Pentium II Xeon processors running at

400/100 and 450/100 MHz. It is integrated with the Intel 440GX system

controller, which consists of the PCI/AGP controller and the PCI/ISA

IDE accelerator (PIIX4E).

The Pentium II Xeon processor like its predecessor, the Pentium Pro

and Pentium II processor, implements a Dynamic Execution micro-

architecture - a unique combination of multiple branch prediction, data

flow analysis, and speculative execution. This means that the Pentium

II Xeon can deliver higher performance than the Pentium processor

while maintaining binary compatibility with

all

Intel

Architecture processors.

Also, the Pentium II Xeon processor is available in 512K, 1MB, and

2MB L2 cache options with the introduction of the Slot 2 socket.

Unlike Slot 1 Pentium IIs, which access the L2 at half the processor

speed, the Slot 2 access the L2 at full processor clock speed.

The PCI/AGP controller host bus interface supports a Pentium II Xeon

processor with 100 MHz bus frequency.

It also provides a 72-bit

DIMM that supports synchronous DRAM (SDRAM) DIMMs. The

PCI/AGP controller introduces a new technology, which is the

Accelerated Graphics Port (AGP) interface.

Supporting up to

533MB/sec MHz data transfer rate, the AGP interface boosts graphics

performance.

System Board

1-1