Introduction - Intel Xeon Datasheet

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Introduction

The Intel® Xeon™ processor with 800 MHz system bus is a 32-bit server / workstation processor
based on improvements to the Intel NetBurst® microarchitecture. It maintains the tradition of
compatibility with IA-32 software and includes features found in the Intel® Xeon™ processor
such as Hyper Pipelined Technology, a Rapid Execution Engine, and an Execution Trace Cache.
Hyper Pipelined Technology includes a multi-stage pipeline, allowing the processor to reach much
higher core frequencies. The 800 MHz system bus is a quad-pumped bus running off a 200 MHz
system clock making 6.4 GB per second data transfer rates possible. The Execution Trace Cache is
a level 1 cache that stores decoded micro-operations, which removes the decoder from the main
execution path, thereby increasing performance.
In addition, enhanced thermal and power management capabilities are implemented including
Thermal Monitor and Demand-Based Switching (DBS) with Enhanced Intel SpeedStep®
Technology. These capabilities are targeted for dual processor (DP) servers and workstations in
data center and office environments. Thermal Monitor provides efficient and effective cooling in
high temperature situations. Demand-Based Switching (DBS) with Enhanced Intel SpeedStep®
Technology allows tradeoffs to be made between performance and power consumption. This may
lower average power consumption (in conjunction with OS support).
The Intel® Xeon™ processor with 800 MHz system bus supports Hyper-Threading Technology.
This feature allows a single, physical processor to function as two logical processors. While some
execution resources such as caches, execution units, and buses are shared, each logical processor
has its own architecture state with its own set of general-purpose registers, control registers to
provide increased system responsiveness in multitasking environments, and headroom for next
generation multithreaded applications. More information on Hyper-Threading Technology can be
found at http://www.intel.com/technology/hyperthread.
Other features within the Intel NetBurst microarchitecture include Advanced Dynamic Execution,
Advanced Transfer Cache, enhanced floating-point and multi-media unit, Streaming SIMD
Extensions 2 (SSE2) and Streaming SIMD Extensions 3 (SSE3). Advanced Dynamic Execution
improves speculative execution and branch prediction internal to the processor. The Advanced
Transfer Cache is a 1 MB, on-die, level 2 (L2) cache with increased bandwidth. The floating-point
and multi-media units include 128-bit wide registers and a separate register for data movement.
Streaming SIMD2 (SSE2) instructions provide highly efficient double-precision floating-point,
SIMD integer, and memory management operations. In addition, (SSE3) instructions have been
added to further extend the capabilities of Intel processor technology. Other processor
enhancements include core frequency improvements and microarchitectural improvements.
The Intel® Xeon™ processor with 800 MHz system bus supports Intel® Extended Memory 64
Technology (Intel® EM64T) as an enhancement to Intel's IA-32 architecture. This enhancement
allows the processor to execute operating systems and applications written to take advantage of the
64-bit extension technology. Further details on Intel® Extended Memory 64 Technology and its
programming model can be found in the 64-bit Extension Technology Software Developer's Guide
at http://developer.intel.com/technology/64bitextensions/.
Intel® Xeon™ processor with 800 MHz system bus is intended for high performance workstation
and server systems with up to two processors on one system bus. The processor will be packaged in
a 604-pin Flip Chip Micro Pin Grid Array (FC-mPGA4) package and will use a surface mount
Zero Insertion Force (ZIF) socket (mPGA604).
Datasheet
Intel® Xeon™ Processor with 800 MHz System Bus
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