HP 647901-S21 16GB Memory PC3-10600
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647901-S21 HP 16GB 1333MHz DDR3 SDRAM Ecc Reg PC3-10600 Ram New

Availability: In Stock
Part Number#: 647901-S21
List Price was: $534.88
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Short Description:
647901-S21 16GB 1333MHz PC3-10600 240pin Ecc Registered Dual Rank DDR3 SDRAM Memory Module for Server | Made by HP | Brand New 3 Years Warranty
Brand Warranty:
3 Years from the Manufacturer
Product Condition:
New Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days

Product Overview

The 647901-S21 is a memory module designed for servers, made by HP. It features 16GB of storage capacity, operates at a clock speed of 1333MHz, and uses DDR3 SDRAM technology. In this article, we'll take a closer look at this memory module, explaining what each of these specifications means and how they contribute to the module's performance.

Memory Capacity

One of the key specifications of the 647901-S21 memory module is its storage capacity. This module has a capacity of 16GB, which means it can store a large amount of data at once. This is especially important for servers, which often need to store and access large amounts of data quickly.

Clock Speed

Another important specification of this memory module is its clock speed. The 647901-S21 operates at a clock speed of 1333MHz. The clock speed of a memory module refers to the speed at which it can read and write data. The higher the clock speed, the faster the module can access and manipulate data.

DDR3 SDRAM Technology

The 647901-S21 memory module uses DDR3 SDRAM technology. DDR3 stands for Double Data Rate 3, which means that the module can transfer data at twice the rate of its clock speed. SDRAM stands for Synchronous Dynamic Random-Access Memory, which means that the module can read and write data in synchronization with the system clock. DDR3 SDRAM technology is an older standard, but it is still widely used in server applications due to its reliability and performance.

ECC Registered

The 647901-S21 memory module is ECC Registered. ECC stands for Error-Correcting Code, which means that the module can detect and correct errors in data transmission. This is an important feature for servers, which need to maintain the integrity of their data at all times. Registered memory, also known as buffered memory, is a type of memory that uses a register to buffer data between the memory controller and the memory module. This helps to reduce the load on the memory controller and improve the stability of the system.

Dual Rank

The 647901-S21 memory module is Dual Rank. Rank refers to the number of memory modules that can be accessed at once. A single-rank memory module has one set of memory chips, while a dual-rank module has two sets of memory chips. Dual-rank memory modules can provide better performance than single-rank modules, as they can transfer data in parallel.


The 647901-S21 memory module has 240 pins. Pins are the small metal connectors on the bottom of the memory module that connect it to the motherboard. The number of pins on a memory module determines the type of memory slot it can be inserted into. In this case, the 647901-S21 is designed to be inserted into a 240-pin DDR3 memory slot.


The 647901-S21 memory module is designed to be used in servers. It is compatible with a wide range of server models, including those made by HP. Before purchasing this memory module, it is important to check the compatibility with your server to ensure that it will work properly.

In Summary, the 647901-S21 16GB 1333MHz PC3-10600 240pin Ecc Registered Dual Rank DDR3 SDRAM Memory Module for Server made by HP is a high-quality memory module designed for use in servers. Its key specifications include 16GB of storage capacity, a clock speed of 1333MHz, DDR3 SDRAM technology, ECC Registered, Dual Rank, and 240 pins. These specifications make it a reliable and high-performance memory module for use in server applications. It is important to check the compatibility with your server before purchasing this memory module to ensure

General Information about the HP 647901-S21

  • Manufacturer: HP
  • Part Number or SKU# 647901-S21
  • Type: Memory (RAM)
  • RAM Type: PC3-10600
  • Product Name: 16GB DDR3 SDRAM Memory Module

Technical Information

  • Storage Capacity: 16GB
  • Memory Technology: DDR3 SDRAM
  • Chips Organization: X4
  • Number Of Modules: 1 X 16GB
  • Bus Speed: 1333mhz DDR3-1333/PC3-10600
  • Data Integrity Check: Ecc
  • Signal Processing: Registered
  • Ram Features: Dual Rank , Low Voltage
  • Cas Latency Timings: Cl9
  • Type: Dram
  • Upgrade Type: System Specific
  • Platform Support: HP Proliant Server

Dimensions & Weight

  • Height: 0.75 Inch
  • Width: 3.5 Inch
  • Depth: 7.8 Inch
  • Weight: 1 LBS


  • HPE Proliant Bl420c Gen8, Bl460c Gen8, Bl660c Gen8, Dl160 Gen8, Dl360e Gen8, Dl360p Gen8, Dl380e Gen8, Dl380p Gen8, Ml350e Gen8, Ml350p Gen8, Sl230s Gen8, Sl250s Gen8, Sl270s Gen8, Sl4540 Gen8, Ws460c Gen8

Contact us or ask for live chat/help if you have any questions about the compatibility of this item to ensure the model's matching features with your current system.

Brand Warranty:
3 Years from the Manufacturer
Product Condition:
New Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days

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What does ALLHDD.Com warranty cover?

30-days to 3 years warranty:

Replacement or refund. In the case of material defects, we will try to replace the product first. The product will be replaced before the expiration of the original warranty. For any failure of hardware, if we cannot process the replacement of the product(s)/model(s), we will refund the original selling/invoiced price. The shipping costs and sales tax, if any, are non-refundable. ALLHDD retains the right to decide whether the item(s) will process for replacement or refund.

What is not covered by our warranty?

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(a) misuse of hardware; accidental damage; carelessness product(s) damage; shock; temperature beyond the specification of any product; faulty installation; operation; modification of goods;

(b) any misuse outside the instructions in the user manual for any specific product;

(c) damaged caused by other hardware or equipment. The warranty will void if the item is returned with physical damage, damage to the retail box, removed from the box, counterfeit labels/labelled by them, or any modifications of internal and external covers. Data loss or damages to any other equipment we do not cover by our offered warranty.

What is the Manufacturer/Brand Warranty?

In general, a manufacturer's warranty service/support is a written guarantee to the buyer of a product. Its terms assure the replacement or repair of the product, if necessary, within a specified period after the purchase (2-5 years depending on the brand/manufacturer). It is typically included in the price of the product. Products are brand new and sealed and the original manufacturer box is complete with the Manufacturer's genuine warranty. For most of the brand new/retail products that come with the manual and box, exceptions may apply (i.e., Cisco, Juniper Networks).

For the server parts (i.e., Dell, HPE) to get Full coverage of the warranty server must have a full 3- 5 years warranty. However, ALLHDD.COM will cover the warranty duration if any Manufacturer doesn't support the advertised warranty and there is no refund for those.
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Important notes:

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Shipping Options and Estimated Delivery Time

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UPS® First Overnight - Saturday
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FedEx Shipping Options:

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Available throughout all 50 states (Hawaii is outbound only)

FedEx Priority Overnight®
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FedEx First Overnight®
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Worldwide Shipping Options:

UPS®/FedEx® International Economy

Estimated delivery time: 4-7 business days

UPS®/FedEx® International Priority

Estimated delivery time: 2-4 business days

UPS®/FedEx® Ground Shipping Canada

Estimated delivery time: 5-8 business days

Important notes:

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