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Dual-Core Intel® Xeon® Processor 5000 Series Datasheet 
9
Introduction
1
Introduction
The Dual-Core Intel
®
 Xeon
®
 Processor 5000 series are Intel dual core products for dual 
processor (DP) servers and workstations. The Dual-Core Intel Xeon Processor 5000 
series are 64-bit server/workstation processors utilizing two physical Intel NetBurst
®
 
microarchitecture cores in one package. The Dual-Core Intel Xeon Processor 5000 
series include enhancements to the Intel NetBurst microarchitecture while maintaining 
the tradition of compatibility with IA-32 software. Some key features include Hyper 
Pipelined Technology and an Execution Trace Cache. Hyper Pipelined Technology 
includes a multi-stage pipeline depth, allowing the processor to reach higher core 
frequencies. The Dual-Core Intel Xeon Processor 5000 series contain a total of 4 MB of 
L2 Advanced Transfer Cache, 2 MB per core. The 1066 MHz Front Side Bus (FSB) is a 
quad-pumped bus running off a 266 MHz system clock making 8.5 GBytes per second 
data transfer rates possible. The 667 MHz Front Side Bus (FSB) is a quad-pumped bus 
running off a 166 MHz system clock making 5.3 GBytes per second data transfer rates 
possible.
In addition, enhanced thermal and power management capabilities are implemented 
including Thermal Monitor (TM1) and Enhanced Intel SpeedStep
®
 technology. These 
technologies are targeted for dual processor (DP) systems in enterprise environments. 
TM1 provides efficient and effective cooling in high temperature situations. Enhanced 
Intel SpeedStep technology provides power management capabilities to servers and 
workstations.
The Dual-Core Intel Xeon Processor 5000 series also include Hyper-Threading 
Technology (HT Technology) resulting in four logical processors per package. This 
feature allows multi-threaded applications to execute more than one thread per 
physical processor core, increasing the throughput of applications and enabling 
improved scaling for server and workstation workloads. 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 units, 
and Streaming SIMD Extensions 3 (SSE3). Advanced Dynamic Execution improves 
speculative execution and branch prediction internal to the processor. The Advanced 
Transfer Cache in each core is a 2 MB level 2 (L2) cache. The floating point and multi-
media units include 128-bit wide registers and a separate register for data movement. 
Streaming SIMD3 (SSE3) instructions provide highly efficient double-precision floating 
point, SIMD integer, and memory management operations. Other processor 
enhancements include core frequency improvements and microarchitectural 
improvements.
The Dual-Core Intel Xeon Processor 5000 series support 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/
.
In addition, the Dual-Core Intel Xeon Processor 5000 series support the Execute 
Disable Bit functionality. When used in conjunction with a supporting operating system, 
Execute Disable allows memory to be marked as executable or non executable. This 
feature can prevent some classes of viruses that exploit buffer overrun vulnerabilities