Compaq 850 manual Pentium 4 Processor

Chapter 2 System Overview

2.4.1 PENTIUM 4 PROCESSOR

These systems feature the Intel Pentium 4 processor featuring Intel’s NetBurst Micro- Architecture. This processor is backward-compatible with software written for the Pentium III/II, Pentium MMX, Pentium Pro, Pentium, and x86 microprocessors.

Key features of the Pentium 4 processor include:

♦Hyper-Pipelined Technology for higher performance

♦Rapid Execution Engine with increased throughput and reduced latency

♦Quad-pumped Front Side Bus (FSB) for balanced performance with RDRAM

♦Execution Trace Cache for more efficient branch-handling

♦Improved dynamic execution for higher efficiency

♦Additional Streaming SIMD Extensions (SSE2) for increased video, audio, and speech processing

♦On-die (full speed) 256-KB ECC second-level cache

These systems employ a PGA423 zero-insertion-force (ZIF) socket designed for mounting a “Flip- Chip” (FC-PGA423) processor package (Figure 2-7).

Heat Sink

Retaining Clip

Heat Sink

Retaining Clip

Lock/Unlock Handle (Shown in unlock position)

Heat Sink

FC-PGA423 Package

PGA423

Socket

Figure 2–7.Processor Assembly And Mounting

The PGA423 socket allows easy changing/upgrading of the processor. Raising the Lock/Unlock handle of the socket in the vertical position allows the processor package to be removed or inserted into the socket. Lowering the Lock/Unlock handle in the down (horizontal) position locks the processor package in place. The heat sink is placed on top of the processor and held in place by two retaining clips.

2-10Compaq Deskpro EXS and Workstation 300 Personal Computers

Featuring the Intel Pentium 4 Processor

First Edition – December 2000