Processor; Intel Pentium 4 (Socket 478) - HP Evo D510 e-pc Technical Reference Manual

System Features

Processor

The Compaq Evo D510 e-pc is equipped with either a socket 478B Intel Celeron or Pentium 4
processor. The processor is connected to the system board through a Pin Grid Array (PGA)
478B Socket.
A heatsink and fan (not shown) cover the processor to prevent it from overheating. If the
heatsink is removed, the thermal interface material between the heatsink and the processor must
be replaced. If no thermal interface is used or the old one is re-used, then cooling may be
impaired and the processor damaged.

Intel Pentium 4 (Socket 478)

The Intel Pentium 4 processor has the following features:
■
Speeds ranging up to 2.6 GHz at the time of initial product release
■
Data bus frequency of 400 MHz
■
Dual Independent Bus architecture, which combines a dedicated 64-bit L2 cache bus
(supporting 256 KB or 512 KB) plus a 64-bit system bus that enables multiple simultaneous
transactions
■
MMX2 technology, which gives higher performance for media, communications and 3D
applications
■
Dynamic execution to speed up software performance
■
Internet Streaming SIMD Extensions 2 (SSE2) for enhanced floating point and 3D
application performance
■
Uses multiple low-power states, such as AutoHALT, Stop-Grant, Sleep and Deep Sleep to
conserve power during idle times (refer to page 47 for PC power states)
The Pentium 4 processor is packaged in a pin grid array (PGA) that fits into a PGA478B
socket. The Pentium 4 integrates the following cache memories on the same die as the processor
cache:
■
A trace instruction and L1 data cache. The trace cache is 4-way set associative.
■
A 256 KB or 512 KB L2 cache. The L2 cache is 8-way associative.
2–6
478B Socket
(under heatsink)
Technical Reference Guide