Samsung 64GB DDR4 2666MHz PC4-21300 ECC RDIMM Memory Module

The Samsung M393A8K40B22-CWD is a 64 GB DDR4 ECC Registered DIMM designed for servers that demand dependable memory capacity and consistent uptime. It follows the PC4-21300 specification, delivering a 2666 MHz data rate while operating at just 1.2 V, so it supports fast throughput without placing extra strain on your power budget or cooling system.

Integrated error-correcting code actively detects and fixes single-bit faults before they reach your operating system or applications, reducing the risk of crashes and silent data corruption. A built-in register buffers control and command signals between the memory controller and the DRAM chips, allowing stable operation in multi-DIMM configurations often found in rack-mount servers and blade systems.

The 4Rx4 organization packs 64 GB into a single 288-pin module, making it especially useful when you need to maximize capacity in platforms with limited slots. Drop it into virtualization hosts that run dozens of virtual machines, database clusters that process large datasets, or any high-performance computing node where memory reliability is critical.

Compatibility is straightforward: install the module in any motherboard or server chassis that supports DDR4 ECC Registered DIMMs at 2666 MHz, and the system firmware will recognize the capacity and ECC features automatically.

• 64 GB DDR4 ECC Registered DIMM for enterprise servers
• 2666 MHz speed rating (PC4-21300) balances bandwidth and latency
• Operates at 1.2 V to help reduce power consumption and heat
• ECC circuitry corrects single-bit memory errors on the fly
• On-board register buffers control signals for greater stability with multiple modules
• 4Rx4 configuration within a standard 288-pin RDIMM footprint
• Compatible with server platforms that support DDR4 ECC Registered memory