Compaq W4000 manual Processor Upgrading

Chapter 3 Processor/Memory Subsystem

The Pentium 4 processor is software-compatible with Celeron, Pentium II, Pentium MMX, Pentium, and x86 processors, but will require the latest versions of operating system software to take advantage of the Streaming SIMD extensions (SSE2).

3.2.2 PROCESSOR UPGRADING

All units use mPGA478B ZIF mounting socket and ship with the Pentium 4 processor in a Flip- Chip (FC-PGA478) package installed with a passive heat sink. The FC-PGA478 package consists of the processor die mounted “upside down” on a PC board. This arrangement allows the heat sink to come in direct contact with the processor die. The heat sink and attachment clip are specially designed provide maximum heat transfer from the processor component.

CAUTION: Attachment of the heat sink to the processor is critical on these systems. ! Improper attachment of the heat sink will likely result in a thermal condition.

Although the system is designed to detect thermal conditions and automatically shut down, such a condition could still result in damage to the processor component. Refer to the applicable Maintenance and Service Guide for processor installation instructions.

3-4Compaq Evo and Workstation Personal Computers

Featuring the Intel Pentium 4 Processor

Second Edition - January 2003