HPE 879505-B21 8GB Memory PC4-21300
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HPE 879505-B21 8GB RAM DDR4 2666mhz Pc4-21300 Cl19 SDRAM Bulk

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Part Number#: 879505-B21
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Short Description:
879505-B21 8 Gigabytes(GB) (1X8GB) 1rx8 Single Rank X8 Double Data Rate 4 (DDR4) 2666 Megahertz (MHz) Synchronous Dynamic Random Access Memory (SDRAM) Pc4-21300 Cl19 288-pin Unbuffered Standard Memory Gen10 for Server | Made by HPE | New Bulk Pack
Product Condition:
New Bulk Pack
Warranty provided by ALLHDD.COM:
90 Days

Product overview for the HPE 879505-B21

In the dynamic world of server hardware, one component plays a crucial role in ensuring optimal performance – the memory module. Among the myriad options available, the HPE 879505-B21 stands out, offering 8GB DDR4 memory designed for Gen10 servers. Let's delve into the details of this specific memory module, exploring its specifications, features, and how it contributes to server efficiency.

Overview of HPE 879505-B21 Introduction to DDR4 Technology

The HPE 879505-B21 is a DDR4 memory module, representing the fourth generation of Double Data Rate (DDR) Synchronous Dynamic Random Access Memory (SDRAM). DDR4 technology is an improvement over its predecessor, DDR3, providing better performance, higher data transfer rates, and increased energy efficiency.


This memory module comes with a capacity of 8GB, making it suitable for various computing tasks. The 1X8GB configuration implies a single module with an 8GB capacity, catering to the demands of modern server applications.

Memory Rank and Organization

The memory module is specified as 1rx8, indicating a single rank module with an 8-bit data organization. This configuration is crucial for optimizing data transfer and access speeds in server environments.

Clock Speed: DDR4 2666MHz

Clock speed is a critical factor in determining the data transfer rate of a memory module. The HPE 879505-B21 operates at a clock speed of 2666MHz, also known as PC4-21300. This high-speed performance is especially beneficial for handling complex computational workloads and ensuring swift response times.

CAS Latency (CL) and Timing Parameters

The CL19 designation specifies the CAS Latency of the memory module. CAS Latency is the time delay between the memory controller sending a read command and the data being available. A CL19 latency ensures efficient data retrieval, contributing to overall system responsiveness.

Form Factor: 288-pin Unbuffered DIMM

The physical design of the memory module follows the 288-pin Unbuffered DIMM (UDIMM) form factor. Unbuffered DIMMs are known for their simplicity and lower latency compared to registered DIMMs, making them well-suited for various server applications.

Compatibility with Gen10 Servers

The HPE 879505-B21 memory module is specifically designed for Gen10 servers, aligning with Hewlett Packard Enterprise's commitment to providing reliable and optimized components for their server infrastructure.

Importance of Memory in Server Environments

Memory modules play a pivotal role in server environments, affecting system performance, stability, and responsiveness. Understanding the significance of each specification in the HPE 879505-B21 can shed light on how it contributes to the overall efficiency of Gen10 servers.

Enhanced Performance with DDR4 Technology

The transition from DDR3 to DDR4 technology represents a leap forward in memory performance. DDR4 offers higher data transfer rates, lower power consumption, and increased memory module capacities. This translates to improved server performance, particularly in data-intensive applications.

Optimal Data Transfer Rates at 2666MHz

The 2666MHz clock speed of the HPE 879505-B21 ensures that data can be transferred at high rates, minimizing latency and contributing to the seamless operation of servers. This is particularly beneficial in scenarios where quick access to large datasets is crucial.

Single Rank for Efficiency

The 1rx8 configuration indicates a single rank module, optimizing memory access. Single-rank modules are known for their simplicity and efficiency, making them suitable for a wide range of computing tasks.

CAS Latency and Timing Precision

The CL19 CAS Latency of the memory module ensures that the data is accessed with minimal delay, contributing to the overall responsiveness of the server. The precise timing parameters further enhance the efficiency of data retrieval and processing.

Form Factor and Server Compatibility

The 288-pin Unbuffered DIMM form factor is well-suited for server environments where simplicity and reliability are paramount. The compatibility with Gen10 servers ensures that the HPE 879505-B21 seamlessly integrates into Hewlett Packard Enterprise's server infrastructure.

Use Cases and Application Scenarios

Understanding the specific scenarios where the HPE 879505-B21 excels is crucial for potential users looking to enhance their server capabilities. Here are some use cases and application scenarios where this memory module proves advantageous:

Data-Centric Applications

In environments where data-centric applications are prevalent, such as databases and analytics platforms, the high capacity (8GB) and efficient data transfer rates (2666MHz) of the HPE 879505-B21 contribute to smooth data processing and retrieval.

Virtualization Environments

Virtualization places significant demands on server memory. The HPE 879505-B21's single rank configuration and optimal timing parameters make it well-suited for virtualization environments, where responsiveness and efficiency are critical.

Compute-Intensive Workloads

For servers handling compute-intensive workloads, such as scientific simulations or rendering tasks, the high clock speed and low latency of the HPE 879505-B21 ensure that data is processed swiftly, enhancing overall performance.

General-Purpose Server Applications

The versatility of the HPE 879505-B21 makes it suitable for general-purpose server applications. Its compatibility with Gen10 servers means it can be seamlessly integrated into various server setups, catering to the diverse needs of modern computing environments.

Compatibility Considerations

Ensuring a smooth integration of the HPE 879505-B21 into a server setup involves understanding its installation process and compatibility with other hardware components.


Installing the HPE 879505-B21 involves inserting the memory module into the appropriate memory slot on the server's motherboard. The 288-pin form factor ensures compatibility with standard DDR4 memory slots. However, users should consult the server's manual for specific instructions regarding memory installation.

Compatibility with Gen10 Servers

The HPE 879505-B21 is explicitly designed for Gen10 servers. Before purchasing, users should verify the compatibility of their server model with this memory module. This information can typically be found in the server's documentation or through Hewlett Packard Enterprise's official compatibility guides.

Memory Considerations

For optimal performance, users should consider the memory configuration of their server, taking into account factors such as matching capacities, clock speeds, and timings. Mixing memory modules with different specifications may result in suboptimal performance or system instability.

General Information about this HPE 879505-B21

  • Manufacturer: HPE
  • Model Number or SKU# 879505-B21
  • Type: Memory (RAM)
  • RAM Type: Pc4-21300
  • Product Name: 8GB DDR4 SDRAM Dimm 288-Pin Unbuffered

Technical Information about 8GB DDR4 RAM

  • Storage Capacity: 8GB
  • Memory Technology: DDR4 SDRAM
  • Number Of Modules: 1 X 8GB
  • Memory Speed: 2666 MHZ (PC4-21300)
  • Data Integrity Check: ECC
  • Features: Dual Rank, Unbuffered
  • Cas Latency Timings: Cl19
  • Voltage: 1.2 V
  • Form Factor: Dimm 288-pin
  • Platform Support: HP Proliant Gen10

Compatibility of 8GB DDR4 Memory

  • Proliant Dl20 Gen10, Dl20 Gen10 Entry, Dl20 Gen10 Performance, Dl20 Gen10 Solution, Ml30 Gen10, Ml30 Gen10 Entry, Ml30 Gen10 Performance, Ml30 Gen10 Performance, Ml30 Gen10 Solution

Finally, the HPE 879505-B21 8GB DDR4 memory module stands as a reliable and high-performance component designed for Gen10 servers. Its DDR4 technology, 2666MHz clock speed, single-rank configuration, and compatibility with Gen10 servers make it a versatile choice for a range of server applications. Understanding the significance of each specification, its use cases, and considerations for installation and compatibility empowers users to make informed decisions when upgrading or expanding their server memory. As technology continues to advance, memory modules like the HPE 879505-B21 play a crucial role in optimizing server performance and contributing to the efficiency of modern computing environments.

Product Condition:
New Bulk Pack
Warranty provided by ALLHDD.COM:
90 Days

About New Bulk Pack Products

New Bulk Pack products come with clamshell boxes and do not have any manufacturer warranty. Many times manufacturers disassemble whole units to use parts or pulled from a new system. Typically, this product doesn't come with software or instructions unless indicated and no Manufacturer’s genuine warranty. You can take note these are not brand new products.


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