The HP 64GB DDR2 Registered ECC Server Memory 495605-B21 is a high-performance, enterprise-grade memory solution designed for servers that demand maximum reliability, stability, and scalability. Whether you are running a mission-critical database, virtualized environment, or large-scale business application, this memory module is engineered to deliver exceptional efficiency and uptime. With its robust architecture, ECC support, and large capacity, the 495605-B21 is an ideal upgrade for businesses aiming to keep their IT infrastructure future-ready.
High Capacity for Enterprise Workloads
The standout feature of the HP 495605-B21 is its 64GB DDR2 memory capacity, which makes it perfectly suited for data-intensive workloads. Servers that handle virtualization, cloud computing, or advanced analytics require large amounts of memory, and this module ensures that you have the headroom necessary to manage even the most demanding tasks without compromise. By upgrading to this module, businesses can improve application responsiveness and support higher numbers of users simultaneously.
DDR2 Performance for Compatibility
While DDR2 is an older standard compared to DDR3 and DDR4, many enterprise-grade servers still rely on DDR2 modules for stability and compatibility. The 495605-B21 runs at PC2-5300 speeds, delivering 667MHz performance for systems optimized for DDR2 technology. This ensures seamless operation with legacy server platforms while providing a reliable memory backbone for organizations that prefer proven, field-tested hardware.
Registered ECC Reliability
The HP 495605-B21 is a Registered ECC (Error-Correcting Code) memory module, specifically engineered for servers where data integrity is critical. ECC technology automatically detects and corrects memory errors in real-time, reducing the risk of crashes, data corruption, or downtime. For businesses where uptime directly affects profitability, ECC memory like this is essential. The Registered (buffered) design also ensures improved stability in multi-module configurations, making it an excellent choice for systems running multiple high-capacity modules.
Optimized for HP Servers
Engineered by HP, the 495605-B21 is fully tested and validated for compatibility with a wide range of HP ProLiant and enterprise-class servers. This ensures a seamless integration with your existing hardware, allowing IT administrators to deploy memory upgrades without concerns about system stability or compatibility. HP’s stringent quality control guarantees that every module meets the highest standards of performance and reliability.
Scalability and Future-Proofing
For businesses planning to expand their infrastructure, the 495605-B21 offers the scalability required for growing workloads. With a 64GB module, IT teams can consolidate workloads, reduce the need for frequent hardware refreshes, and achieve a higher return on investment. This makes it an excellent choice for organizations aiming to extend the life cycle of their DDR2-based server platforms.
Use Cases
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Data Centers: Increase efficiency in handling virtual machines, storage operations, and cloud-based services.
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Enterprise Applications: Run large-scale ERP, CRM, or financial software with smoother performance.
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Virtualization: Support a larger number of VMs on the same hardware with faster response times.
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High-Availability Systems: Ensure uptime and data integrity with ECC-enabled reliability.
Key Benefits of HP 495605-B21
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Large 64GB capacity for handling memory-intensive workloads.
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DDR2 PC2-5300, 667MHz performance optimized for legacy server systems.
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ECC technology ensures data integrity and reduces system crashes.
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Registered (buffered) design for improved stability in multi-DIMM setups.
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Backed by HP’s quality standards, ensuring compatibility with ProLiant servers.
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Ideal for data centers, enterprise environments, and mission-critical applications.
Why Choose the HP 495605-B21?
Investing in the HP 495605-B21 means choosing a server memory upgrade that prioritizes both performance and reliability. While newer memory technologies like DDR4 and DDR5 exist, many enterprises continue to depend on DDR2-based infrastructure that has proven stable and effective. For these systems, the 495605-B21 offers a cost-effective way to extend system performance without replacing entire servers.
It’s not just a memory upgrade—it’s a strategic investment that enhances the productivity, stability, and resilience of your business operations. If you’re looking for a dependable, enterprise-class solution, the HP 64GB DDR2 Registered ECC Memory 495605-B21 is designed to deliver exactly that.

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