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HP 638317-L21 Intel Xeon E5645 Processor

Six-core Intel Xeon E5645 server processor from HP with 12MB cache and efficient 80W power draw.

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Overview

The HP 638317-L21 is an HP-packaged processor kit featuring the Intel Xeon E5645, a six-core server CPU based on Intel's 32nm Westmere architecture. Running at 2.53GHz with 12MB of shared L3 cache, the E5645 supports hyper-threading to provide 12 processing threads, making it capable of handling concurrent server workloads including virtualization, database operations, and web hosting. Its 80-watt thermal design power keeps energy consumption and cooling requirements reasonable, which is important in dense server environments.

As an HP kit, the 638317-L21 is validated for use in specific HP ProLiant server models, which simplifies compatibility concerns for system administrators managing HP infrastructure. While the Westmere platform is several generations behind current Xeon offerings, the E5645 remains a relevant component for organizations extending the service life of existing servers. It serves well as a drop-in replacement or an upgrade from lower-core-count processors in the same socket family, delivering incremental performance gains without requiring a full platform replacement.

Specifications

Brand
HP
Model
638317-L21
Processor
Intel Xeon E5645
Clock Speed
2.53GHz
Cores
6
Cache
12MB
TDP
80W

Frequently Asked Questions

This is an HP-packaged processor kit (model 638317-L21) intended for compatible HP ProLiant servers. Check HP's compatibility documentation for your specific server model before purchasing.
The Intel Xeon E5645 is a six-core processor running at 2.53GHz with 12MB of L3 cache and a thermal design power of 80 watts.
Yes, the Intel Xeon E5645 supports hyper-threading, providing 12 threads from its 6 physical cores for improved multithreaded workload performance.
No, the Xeon E5645 is based on Intel's older Westmere architecture. It is a legacy processor typically used as a replacement or upgrade in existing compatible server hardware.

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