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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.

How it compares

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

Price $1,350.99
Pricier than about 83% of the 6,523 comparable items (median $188.99).

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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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