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Green DDR4 LRDIMM module with gold contacts and black chips

Axiom

Axiom 838085-B21-AX DDR4 64GB LRDIMM 2666MHz CL19 1.2V ECC

SKU CH-3ATW-MZP4Y

64 GB DDR4 ECC load-reduced DIMM running at 2666 MHz with CL19 latency at 1.2 V

  • 64 GB capacity supports large virtualised workloads
  • DDR4-2666 speed delivers 21300 MT/s bandwidth
  • CL19 latency balances timing with density
  • 2 V operation reduces server power draw
  • 288-pin load-reduced ECC design protects data integrity

Server Memory Capacity

The Axiom 838085-B21-AX is a 64GB DDR4 LRDIMM module built for server platforms that require high-density memory. Its load-reduced design lowers electrical load on the memory bus, allowing larger capacities per channel. The module operates at 2666MHz with a CAS latency of 19 and runs at 1.2V. It targets administrators upgrading compatible enterprise systems.

64GB Load-Reduced Headroom

This 64GB stick provides substantial capacity headroom for virtualisation hosts, database buffers and memory-intensive workloads. The PC4-21300 rating delivers 2666MT/s throughput suitable for balanced compute tasks. ECC protection corrects single-bit errors to maintain data integrity. The module reaches its limit when the platform's maximum DIMM slots or per-channel rank limits are filled.

288-Pin ECC LRDIMM Build

The 288-pin LRDIMM form factor fits standard DDR4 server DIMM sockets with a load-reduced register that improves signal integrity at high densities. ECC circuitry adds reliability for mission-critical deployments. Installation follows normal keyed alignment; the module's height matches typical server DIMM clearance envelopes. No special mounting hardware or cooling beyond standard server airflow is required.

Highlights

  • 64 GB capacity supports large virtualised workloads
  • DDR4-2666 speed delivers 21300 MT/s bandwidth
  • CL19 latency balances timing with density
  • 2 V operation reduces server power draw
  • 288-pin load-reduced ECC design protects data integrity

Specifications

No published specifications for this item yet.

Questions about this item

Will the 288-pin DDR4 LRDIMM work in my older server that uses registered DDR4 DIMMs?

The module uses the standard 288-pin DDR4 form factor, but load-reduced and registered DIMMs cannot be mixed in the same channel; check your platform documentation to confirm LRDIMM support.

How can I confirm the 64GB module is running at 2666MHz with CL19 timings after installation?

Enter the system BIOS or UEFI and verify the memory speed shows 2666 MT/s and CAS latency 19; the ECC status should also report as active.

Does the 838085-B21-AX come with a heat spreader or do I need to buy cooling separately?

The module ships as a bare LRDIMM without an integrated heat spreader; server chassis airflow normally provides sufficient cooling.

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