HP 647901-S21 16GB DDR3-1333 ECC Registered DIMM

Name: HP 647901-S21 16GB DDR3-1333 ECC Registered DIMM
Brand: HP
SKU: 647901-S21-PCW

HP-compatible 16GB DDR3 ECC registered server memory delivers reliable performance at energy-efficient 1.35V operation.

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Overview

Enhance Server Performance with HP 16GB DDR3 ECC Registered Memory

Upgrade your server's memory with this HP Compatible 16GB PC3-10600 DDR3-1333 ECC Registered DIMM. Designed for reliable performance and compatibility with HP systems, this memory module ensures smooth operation for your critical applications.

Specifications:

Brand: HP Compatible
HP Part Number: 647901-S21
Capacity: 16GB
Memory Type: DDR3
Speed: 1333MHz (PC3-10600)
Rank: 2Rx4
Error Correction: ECC Registered
Voltage: 1.35V
Form Factor: DIMM

Frequently Asked Questions

What HP servers and workstations is this memory module compatible with?

This module is compatible with HP systems that accept the 647901-S21 part number, including select ProLiant DL, ML, and BL series servers. Check your system's qualified memory list to confirm compatibility.

What does ECC Registered mean, and why does it matter?

ECC (Error-Correcting Code) Registered memory detects and corrects single-bit memory errors automatically, preventing data corruption and system crashes — essential for servers running critical applications around the clock.

Can this DDR3 module be mixed with existing server memory?

It is recommended to use matching memory modules (same capacity, speed, and rank) across all slots for optimal performance and to avoid compatibility issues in multi-channel configurations.

What is the operating voltage of this DIMM?

This module operates at 1.35V (low voltage), which reduces power consumption and heat output compared to standard 1.5V DDR3 modules while maintaining DDR3-1333 performance.

Is this an HP original part or a compatible replacement?

This is an HP-compatible third-party module matched to the HP part number 647901-S21. It is designed to meet the same specifications as the original HP memory.

What Buyers Say

What buyers are saying This HP-compatible 16GB DDR3 ECC Registered DIMM is a practical and affordable way to expand server memory for systems that support the 647901-S21 specification. Users find it reliable for extending the useful life of existing DDR3-era HP servers without the cost of original HP parts. The low-voltage 1.35V design is appreciated for reducing power and thermal overhead in dense server environments.

👍 Pros

16GB capacity provides a meaningful upgrade per DIMM slot, reducing the number of modules needed
ECC Registered error correction prevents data corruption in mission-critical server environments
1.35V low-voltage operation reduces power consumption and heat generation
DDR3-1333 speed is compatible with a wide range of existing server platforms
Matched to HP part number 647901-S21 for straightforward compatibility verification

👎 Cons

DDR3 technology is an older generation, not compatible with newer DDR4 or DDR5 server platforms
1333MHz speed is slower than higher-speed DDR3 modules available at 1600MHz or 1866MHz
ECC Registered DIMMs are not compatible with standard desktop motherboards
Third-party compatible module rather than original HP-manufactured part
2Rx4 rank configuration may have specific slot population requirements on some server boards

Summarized from aggregated buyer feedback for this product. Rating and review count sourced from Amazon.com.

HP 647901-S21 16GB DDR3-1333 ECC Registered DIMM

Overview

Enhance Server Performance with HP 16GB DDR3 ECC Registered Memory

Specifications:

Frequently Asked Questions

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