HP Compaq dc71 Series, Technical Reference Manual

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2-24 361834-002 Technical Reference Guide
System Overview
2.4.1 Intel Pentium 4 Processor
The models covered in this guide feature the Intel Pentium 4 processor with Hyper-Threading
technology. This processor is backward-compatible with software written for the Pentium III,
Pentium II, Pentium MMX, Pentium Pro, Pentium, and x86 microprocessors. The processor
architecture includes a floating-point unit, 32-KB first and 1-MB secondary caches, and
enhanced performance for multimedia applications through the use of multimedia extension
(MMX) instructions. Also included are streaming SIMD extensions (SSE and SSE2) for
enhancing 3D graphics and speech processing performance. The Pentium 4 processor features
Net-Burst Architecture that uses hyper-pipelined technology and a rapid-execution engine that
runs at twice the processor's core speed.
These systems employ a zero-insertion-force (ZIF) Socket-T designed for mounting an LGA775
processor package (Figure 2-20).
Figure 2-20. Processor Socket and Processor Package
To remove the processor:
1. Remove the processore heat sink/fan assembly (not shown).
2. Release the locking lever (
1
) by first pushing down, then out and up.
3. Pull up the securing frame (
2
).
4. Grasp the processor (
3
) by the edges and lift straight up from the socket.
✎
The processor heatsink/fan assembly mounting differs between form factors. Always use the
same assembly or one of the same type when replacing the processor. Refer to the applicable
Service Reference Guide for detailed removal and replacement procedures of the heatsink/fan
assembly and the processor.