HP

HP 504351-B21 8GB PC2-6400 Reg Memory Kit

3.8 (4 reviews)

Enhance Server Performance with Reliable Memory This HP 8GB Reg PC2-6400 2X4GB LP Kit is designed to boost the performance and reliability of your server. This kit ensures seamless operation for critical applications. Brand: HP Model: 504351-B21 Memory Size: 8GB (2 x 4GB) Me...

$11.04*
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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

Enhance Server Performance with Reliable Memory

This HP 8GB Reg PC2-6400 2X4GB LP Kit is designed to boost the performance and reliability of your server. This kit ensures seamless operation for critical applications.

  • Brand: HP
  • Model: 504351-B21
  • Memory Size: 8GB (2 x 4GB)
  • Memory Type: Reg PC2-6400

Key Features

Works with the following models: Hewlett Packard 453431-B21, Hewlett Packard 500099-001

Hewlett Packard 500921-001, Hewlett Packard 500923-001, Hewlett Packard 510143-001

Specifications

Memory Capacity
8GB
Memory Type
PC2-6400 Reg Memory Kit
Compatible HP Models
453431-B21, 500099-001, 500921-001, 500923-001, 510143-001

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Pros & Cons

👍 Pros

  • Provides an 8GB capacity upgrade, significantly enhancing the server's ability to handle larger workloads and applications.
  • Features PC2-6400 memory, ensuring a fast data transfer rate for improved system responsiveness.
  • This memory is registered (buffered), which improves stability and reliability for server environments by reducing electrical load on the memory controller.
  • Specifically compatible with several HP models including 453431-B21, 500099-001, 500921-001, 500923-001, and 510143-001.
  • Designed by HP, ensuring optimal compatibility and performance with HP server systems.

👎 Cons

  • This memory kit is specifically designed for older PC2-6400 DDR2 systems, making it incompatible with newer DDR3 or DDR4 servers.
  • The 8GB capacity, while an upgrade for older systems, is relatively small compared to modern server memory capacities.
  • Registered memory is generally not compatible with non-registered (unbuffered) systems, limiting its use to specific server architectures.
  • Compatibility is limited to a narrow list of specific Hewlett Packard model numbers, not a broad range of servers.
  • Being an older generation memory (DDR2), finding readily available compatible systems might be challenging for new builds.

Frequently Asked Questions

This HP 504351-B21 memory kit provides 8GB of capacity.
It is a PC2-6400 Reg (Registered) Memory Kit, designed for server applications.
This memory kit works with Hewlett Packard models 453431-B21, 500099-001, 500921-001, 500923-001, and 510143-001.
As a registered (Reg) memory kit, it is typically designed for server systems and generally not compatible with standard desktop computers.