When it comes to enhancing server performance and ensuring long-term reliability, memory upgrades play a critical role. The HP 408851-B21 2GB DDR2 ECC Registered PC2-5300 Server Memory is specifically designed to meet the demanding needs of enterprise environments, delivering a balance of speed, stability, and compatibility for HP ProLiant servers. Featuring ECC (Error-Correcting Code) technology and registered buffering, this module ensures that mission-critical applications run seamlessly, reducing downtime and protecting data integrity.
Reliable Performance for Business-Critical Workloads
The 408851-B21 offers a 2GB DDR2 Registered ECC PC2-5300 memory module with a clock speed of 667 MHz. This ensures fast data transfer rates while keeping latency under control, making it a dependable choice for businesses that rely on stable server operations. Whether you are running virtualization, databases, cloud applications, or large-scale enterprise software, the HP 408851-B21 ensures your infrastructure remains responsive and efficient.
ECC (Error-Correcting Code) for Maximum Data Integrity
One of the standout features of the HP 408851-B21 is its ECC support. ECC memory detects and corrects single-bit memory errors before they can affect your system, which is crucial for server environments where even minor data corruption could result in major problems. By ensuring data accuracy, ECC memory extends system uptime and provides peace of mind for IT managers who require stable server performance 24/7.
Registered (Buffered) Memory for Enhanced Stability
This memory module is registered, also known as buffered, which reduces the electrical load on the memory controller. As a result, it allows servers to handle more memory modules at once without sacrificing performance or stability. The 408851-B21 is particularly well-suited for multi-user, high-transaction environments, where system crashes or instability are unacceptable.
Compatibility and Integration with HP ProLiant Servers
The HP 408851-B21 DDR2 memory module is fully tested and certified for compatibility with a wide range of HP ProLiant servers. This guarantees that your upgrade will work seamlessly with your existing infrastructure. HP’s rigorous quality standards ensure that each memory module meets enterprise-level performance benchmarks, allowing IT professionals to upgrade with confidence.
Benefits of Choosing HP 408851-B21 Memory
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Optimized for Servers: Designed for HP ProLiant systems for guaranteed compatibility.
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High-Speed Performance: DDR2 technology running at PC2-5300 (667 MHz) for efficient workloads.
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ECC Protection: Safeguards against data corruption, enhancing system reliability.
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Registered Buffering: Ensures stability in high-density memory environments.
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Enterprise-Grade Quality: Built and tested by HP for mission-critical reliability.
Why the HP 408851-B21 is Ideal for Upgrades
Businesses that depend on constant uptime and reliable data processing cannot afford to compromise on memory quality. The 408851-B21 provides the assurance that your server will continue to perform at optimal levels, even under heavy workloads. Whether you are expanding your memory capacity to support more virtual machines, improving application response times, or preparing for future growth, this module provides the necessary foundation.
Technical Specifications – HP 408851-B21
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Part Number: 408851-B21
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Capacity: 2GB
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Memory Type: DDR2 SDRAM
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Speed: PC2-5300 / 667 MHz
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Form Factor: DIMM
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ECC: Yes (Error-Correcting Code)
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Registered/Buffered: Yes
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Compatibility: HP ProLiant servers and workstations
Investment in Long-Term Reliability
Upgrading with the HP 408851-B21 2GB DDR2 ECC Registered Memory is more than just increasing system RAM—it is an investment in the long-term stability and efficiency of your IT infrastructure. Servers with reliable ECC registered memory experience fewer crashes, reduced downtime, and better overall performance, ensuring that critical business operations remain uninterrupted.
Final Thoughts
The HP 408851-B21 is the perfect memory solution for organizations that need reliable, high-performance server upgrades. With its DDR2 PC2-5300 speed, ECC error correction, and registered buffering, it provides the stability and data integrity required in today’s demanding IT environments. Trusted by IT professionals worldwide, the 408851-B21 continues to be a dependable upgrade option for extending the life and enhancing the efficiency of HP ProLiant servers.
If you’re searching for a proven, enterprise-grade memory solution, the HP 408851-B21 2GB DDR2 ECC Registered PC2-5300 Server Memory is an excellent choice for keeping your systems running at peak performance.

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