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
Four green DDR4 LRDIMM sticks with gold contacts and black chips

OWC

OWC 128GB (4x32GB) DDR4 2666MHz CL19 ECC LRDIMM 1.2V 288-pin server RAM

SKU CH-7Z3Q-CYFGK

A 128GB quad-channel kit of four 32GB DDR4 2666MHz CL19 ECC load-reduced DIMMs for servers and workstations

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Memory rank4Rx4

Capacity 128GB (4 x 32GB)

  • ECC load-reduced design protects data integrity in servers
  • 128 GB total capacity across four 32 GB modules for heavy workloads
  • DDR4 2666 MHz CL19 speed balances throughput and latency
  • 2 V operation lowers power draw in dense configurations
  • Backward compatible with 2133 MHz and 2400 MHz systems

Server ECC LRDIMM kit

This OWC kit supplies 128GB of DDR4 server memory across four 32GB load-reduced DIMMs. It is built for workstations, servers and NAS systems that require ECC error correction and registered buffering. The modules run at 2666MHz with CL19 latency and operate at 1.2V. Standard desktop computers cannot use this memory.

Check platform compatibility

Verify that your motherboard supports DDR4 288-pin ECC LRDIMM modules and accepts 4Rx4 load-reduced ranks. This kit will not work with unbuffered or standard registered DIMMs and cannot be mixed with them. The platform must also be able to address the full 128GB capacity across four slots.

Build integration

The four-module kit populates four DIMM slots and leaves additional slots free for future expansion if the board provides them. Backward compatibility with 2133MHz and 2400MHz bus speeds allows the memory to run in older DDR4 platforms without changes. No heat spreaders are fitted, so airflow clearance is minimal.

How it compares

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

Price $871.99
Pricier than about 79% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $6.81 per GB
Cheaper than about 55% 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 number2L6D44R4128S
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR4 ECC LRDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeLoad Reduced
Memory rank4Rx4
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

5 more in the same range

Questions about this item

What comes in the box and do I need anything else to install the 4x32GB modules?

The kit includes four 32GB DDR4 2666MHz CL19 ECC LRDIMM modules for a total of 128GB. No extra parts are required if your server or workstation has four free 288-pin DDR4 slots that support load-reduced ECC memory.

How do I choose between the 2666MHz rating and the listed backward compatibility speeds?

The modules run at 2666MHz (PC4-21300) by default and will automatically operate at 2400MHz or 2133MHz if your platform only supports those lower speeds.

What does the CL19 latency mean for real-world server performance?

CL19 indicates 19 clock cycles of CAS latency at 2666MHz, giving a baseline access delay. Actual throughput depends on your CPU memory controller, channel population and workload, but the JEDEC-compliant timing ensures stable operation in supported server and workstation platforms.

More in ECC Server RAM

Similar items