Samsung M393A8K40B21-CTC 64GB Memory PC4-19200
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M393A8K40B21-CTC Samsung 64GB 2400MHZ PC4-19200 DDR4 SDRAM Bulk

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Part Number#: M393A8K40B21-CTC
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Short Description:
M393A8K40B21-CTC 64GB 1X64GB 2400MHZ PC4-19200 CAS-17 Ecc Registered Quad Rank X4 DDR4 SDRAM 288-Pin LRDIMM Memory Module for Server | Made by Samsung | New Bulk Pack
Product Condition:
New Bulk Pack
Warranty provided by ALLHDD.COM:
90 Days
Product Overview of the Samsung M393A8K40B21-CTC

The M393A8K40B21-CTC is a 64GB DDR4 memory module designed for server applications. Manufactured by Samsung, a leading technology company, this memory module offers high performance and reliability, making it ideal for use in servers that require robust and efficient memory solutions. In this article, we will provide a detailed explanation of the key features and specifications of the M393A8K40B21-CTC memory module, including its capacity, speed, type, and compatibility. We will also highlight its unique features, such as ECC (Error-Correcting Code) and registered quad rank x4 technology, which make it suitable for server applications.

Capacity and Speed

The M393A8K40B21-CTC memory module has a capacity of 64GB, which means it can store and process a large amount of data simultaneously. This makes it suitable for memory-intensive tasks, such as virtualization, databases, and high-performance computing. The module operates at a speed of 2400MHz, which refers to the number of data transfers it can perform per second. Higher speed memory modules can process data faster, resulting in improved overall system performance.


The M393A8K40B21-CTC memory module is based on DDR4 SDRAM (Double Data Rate 4 Synchronous Dynamic Random Access Memory) technology, which is the latest standard for server memory. DDR4 SDRAM offers higher performance and lower power consumption compared to its predecessor, DDR3 SDRAM. The module has a 288-pin form factor, which refers to the number of pins on the edge connector that connects it to the motherboard. The 288-pin design is a standard for DDR4 memory modules and ensures compatibility with most server motherboards.

CAS-17 Latency and ECC Technology

The M393A8K40B21-CTC memory module has a CAS (Column Address Strobe) latency of 17. CAS latency refers to the delay between the time when a command is issued to the memory module and when the data is available for processing. Lower CAS latency indicates faster data retrieval and processing, resulting in improved system performance. CAS-17 is a common latency for server memory modules, as it provides a good balance between performance and stability.

One of the unique features of the M393A8K40B21-CTC memory module is its ECC (Error-Correcting Code) technology. ECC is a type of memory that can detect and correct errors in data that is stored in memory. This is particularly important for server applications that require high data integrity and reliability. ECC technology can help prevent data corruption and system crashes caused by memory errors, ensuring that critical server data remains accurate and secure.

Registered Quad Rank x4 Technology

The M393A8K40B21-CTC memory module features registered quad rank x4 technology, which is a special type of memory organization. Registered memory, also known as buffered memory, includes an additional register between the memory module and the memory controller on the motherboard. This register helps to reduce the electrical load on the memory bus, allowing for higher density memory modules and improved stability.

Quad rank x4 technology refers to the organization of the memory chips on the module. In this case, the memory chips are arranged in four ranks, with each rank having four memory chips that are accessed in parallel (x4). This allows for higher memory capacity on a single module, making it suitable for server applications that require large amounts of memory.

General Information about the Samsung M393A8K40B21-CTC
  • Manufacturer: Samsung
  • Part Number or SKU# M393A8K40B21-CTC
  • Product Type: Memory (RAM)
  • Sub-Type: PC4-19200
  • Product Name: 64GB DDR4 SDRAM Memory Module
Technical Information
  • Storage Capacity: 64GB
  • Memory Technology: DDR4 SDRAM
  • Number Of Modules: 1 X 64GB
  • Bus Speed: 2400MHZ DDR4-2400/PC4-19200
  • Data Integrity Check: ECC
  • Signal Processing: Registered
  • CAS Latency Timings: Cl17
  • Rank Features: 4rx4
Physical Characteristics
  • Dimensions (W X D X H) : 8.89 X 19.81 X 1.91 Cm (3.5 X 7.8 X 0.75 In)
  • Weight: 0.45 Kg (1 Lb)

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.

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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