Dell A9781931  128GB Ram  PC4-21300
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A9781931 Dell 128GB 2666mhz Pc4-21300 DDR4 SDRAM Cl19 Ecc New

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Part Number#: A9781931
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Short Description:
A9781931 128GB (1X128GB) 2666mhz Pc4-21300 Cl19 Ecc Registered Octa Rank X4 1.2v DDR4 SDRAM 288-Pin Lrdimm Memory Module for Server | Brand New | Kingston OEM
Product Condition:
New Sealed
Warranty provided by ALLHDD.COM:
90 Days

Advantages of 288-Pin RAM

288-Pin RAM has several advantages, including:

  • Increased Bandwidth: 288-Pin DDR4 memory has more pins, providing improved data transfer rates compared to older DDR3 memory.
  • Enhanced Performance: The increased pin count provides more signals, allowing the memory to operate at higher speeds and improve overall system performance.
  • Improved Power Efficiency: 288-Pin DDR4 memory operates at lower voltage compared to DDR3, reducing energy consumption and improving the system's power efficiency.
  • Increased Memory Capacity: 288-Pin DDR4 memory has the ability to support larger memory capacities compared to DDR3, allowing for improved multitasking and application performance.
  • Enhanced Reliability: The increased pin count provides improved signal integrity, reducing the risk of data corruption and ensuring reliable performance.
  • Better Cooling: 288-Pin DDR4 memory modules are designed with better cooling solutions, reducing the risk of thermal throttling and improving stability.
  • Improved Compatibility: 288-Pin DDR4 memory is compatible with most modern desktop computer motherboards that support DDR4 memory.

Limitations of the RAM

The Dell 128GB 2666mhz DDR4 Ram has the following limitations:

  • Compatibility: It is important to check that the system's motherboard is compatible with the DDR4 standard and can support the desired memory capacity and clock speed.
  • Price: High-capacity DDR4 memory can be more expensive compared to lower-capacity DDR3 memory.
  • Limited Upgradability: Systems with limited memory slots may not be able to support a large amount of memory, limiting the ability to upgrade.
  • Power Requirements: DDR4 memory operates at a lower voltage compared to DDR3, but it still requires adequate power to function correctly.
  • Operating System Limitations: The maximum memory capacity supported by the operating system and processor architecture may limit the amount of memory that can be installed.

It is important to consider these limitations when upgrading or purchasing DDR4 memory and to ensure that the system is configured correctly to take full advantage of the improved performance and features provided by DDR4 memory.


ECC RAM stands for Error Correction Code Random Access Memory, which is a type of RAM that provides improved reliability and data accuracy compared to non-ECC RAM. ECC RAM uses an algorithm to detect and correct errors in the data stored in the memory, ensuring that the data is correct and avoiding corruption that can result in system crashes or data loss.

  1. Improved Data Integrity: ECC RAM ensures that the data stored in the memory is correct and free from corruption, improving overall system reliability and data accuracy.
  2. Ideal for Mission-Critical Applications: ECC RAM is commonly used in mission-critical applications, such as servers and workstations, where data integrity and reliability are essential.
  3. Higher Cost: ECC RAM is typically more expensive compared to non-ECC RAM due to the additional hardware and technology required to support error correction.
  4. Compatibility: ECC RAM is compatible with systems that support the ECC feature, but it may not be compatible with systems that do not support ECC or with older systems that use a different type of RAM.

General Information

  • Manufacturer: Dell
  • Manufacturer Part Number: A9781931
  • Type: Memory (RAM)
  • Sub-Type: PC4-21300
  • Product Name: 128GB DDR4 SDRAM Memory Module

Technical Information

  • Storage Capacity: 128GB
  • Memory Technology: DDR4 SDRAM
  • Number Of Modules: 1 X 128GB
  • Bus Speed: 2666mhz DDR4-21300/PC4-2666V
  • Data Integrity Check: Ecc
  • Signal Processing: Registered
  • Cas Latency Timings: Cl19
  • Rank Features: Octa Rank X4


  • This Product Is Compatible With The Following Systems:
  • Poweredge R640
  • Poweredge R940
Product Condition:
New Sealed
Warranty provided by ALLHDD.COM:
90 Days

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