We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green rectangular circuit board with gold edge connectors and black memory chips on both sides

OWC

OWC 64GB DDR4 2666 CL19 4Rx4 ECC LRDIMM 1.2V 288-pin server RAM

SKU CH-09G2-KJ4GK

64GB DDR4-2666 ECC load-reduced LRDIMM, CL19, 1.2V, 288-pin for servers

  • Total capacity64 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Memory rank4Rx4

Capacity 64GB

  • 64GB single module maximises server density
  • ECC load-reduced design protects data integrity in critical workloads
  • DDR4 2666 CL19 timing balances speed and stability
  • 2V operation lowers power draw per module
  • 288-pin JEDEC form factor fits standard server slots

64GB DDR4 ECC LRDIMM for servers

This module provides 64GB of DDR4 ECC load-reduced memory for compatible servers and workstations. It operates at 2666MHz with CL19 latency and a 1.2V voltage. The 288-pin LRDIMM format uses a 4Rx4 rank configuration without a heat spreader. It is designed for system builders and IT professionals upgrading or maintaining enterprise infrastructure.

Load-reduced design requires platform support

Load-reduced DIMMs reduce electrical load on the memory bus to allow higher capacities per channel. This module will not work in standard desktop computers or consumer motherboards. It cannot be mixed with unbuffered or standard registered DIMMs in the same system. The platform must explicitly support DDR4 LRDIMM technology and ECC functionality for correct operation.

Single 64GB module at 2666MHz CL19

This upgrade consists of one 64GB stick rated at DDR4 2666 (PC4-21300) with CL19 timing. Matching capacity, speed, rank configuration and manufacturer across all populated slots is recommended for optimal stability. Verify your server's qualified vendor list and maximum supported density per slot before purchase.

How it compares

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

Price $403.99
Pricier than about 66% of the 6,523 comparable items (median $188.99).
Total capacity 64 GB
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $6.31 per GB
Cheaper than about 61% of the 6,064 comparable items (median $7.25 per GB).

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

Specifications

Product
Brand nameOWC
Part number2L6D44R464 GB
Total capacity64 GB
Product type288-Pin DDR4 ECC LRDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeLoad Reduced
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

5 more in the same range

Questions about this item

Should I choose this single 64GB module or combine smaller capacities?

This is a single 64GB DDR4 2666 CL19 4Rx4 ECC LRDIMM. OWC recommends matching capacity, speed and manufacturer across all slots for optimal performance.

What does the 2666MHz rating deliver in a live server?

The module runs at DDR4 2666 (PC4-21300) with CL19 latency, providing ECC error correction and load-reduced buffering for stable throughput in compatible workstations and servers.

How does the 288-pin LRDIMM interface limit installation?

The 288-pin DDR4 LRDIMM form factor fits only server and workstation boards that support load-reduced ECC memory; it will not work in standard desktop computers or alongside unbuffered DIMMs.

More in ECC Server RAM

Similar items