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Two green Samsung DDR4 RDIMM sticks, 288-pin, silver heatsinks

SAMSUNG

SAMSUNG 64GB (2 x 32GB) DDR4 PC4-21300 2666MHz RDIMM CL19 Server Memory

SKU CH-EXS6-GR5DJ

A 64 GB registered DDR4 server kit with two 32 GB RDIMMs running at 2666 MHz and CL19 latency

  • 64 GB total capacity for demanding server workloads using two 32 GB modules
  • 2666 MHz DDR4 speed rated at PC4-21300 for high-throughput data handling
  • Registered RDIMM design with 288-pin form factor ensures signal integrity in multi-DIMM configurations
  • CL19 CAS latency delivers responsive timing for latency-sensitive applications
  • Samsung M393A4K40CB2-CTD modules validated for server platforms, not compatible with desktops

Server-grade DDR4 registered kit

This 64GB kit comprises two 32GB Samsung DDR4 RDIMMs rated at 2666MHz with CL19 latency. Registered buffering and 288-pin RDIMM form factor target enterprise servers and workstations that require error-correcting stability. It is not compatible with desktop platforms.

64GB capacity for multi-threaded workloads

The paired modules deliver 64GB total, providing headroom for virtualisation hosts, database buffers and large dataset processing. Bandwidth scales with the PC4-21300 specification at 2666MHz. Workloads exceeding this capacity or requiring higher frequency will need additional DIMM slots or faster memory.

Registered RDIMM build with 288-pin interface

Each DIMM uses registered signalling to reduce electrical load on the memory controller, supporting dense population in qualified server boards. The 288-pin DDR4 RDIMM keying prevents insertion into unbuffered desktop slots. Daily operation assumes ECC-capable chipsets and adequate airflow across the module height.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $317.99
Pricier than about 62% of the 6,523 comparable items (median $188.99).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

No published specifications for this item yet.

Questions about this item

Will these 288-pin DDR4 RDIMMs work in a motherboard that only supports unbuffered UDIMMs?

No, registered RDIMMs require a chipset and BIOS that support registered memory; they will not function in a desktop board that accepts only unbuffered UDIMMs.

How can I verify the kit is running at 2666 MHz with CL19 after installation?

Check the memory speed and timings in the server BIOS or use a tool such as CPU-Z; both should report 2666 MHz and CAS latency 19 for each M393A4K40CB2-CTD module.

Does the package contain only the two 32 GB RDIMMs or are extra brackets or cables included?

The bundle supplies only the two 32 GB DDR4 RDIMMs; no brackets, cables or other accessories are provided.

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