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Eight green DDR4 LRDIMM sticks with gold contacts, no heat spreaders

OWC

OWC 256GB (8x32GB) DDR4 2666MHz CL19 ECC Load Reduced LRDIMM 1.2V 288-pin server RAM

SKU CH-YEC9-F6WA7

Eight 32GB DDR4 2666MHz ECC load-reduced DIMMs totalling 256GB for server and workstation upgrades

  • Total capacity256 GB (8 × 32 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Memory rank4Rx4

Capacity 256GB (8 x 32GB)

  • 256GB total capacity from eight 32GB modules
  • ECC load-reduced design protects server data integrity
  • DDR4 2666MHz CL19 speed for responsive workloads
  • 2V operation reduces power draw per module
  • Backward compatible with 2133MHz and 2400MHz systems

Server-grade ECC LRDIMM kit

This OWC kit delivers 256GB across eight 32GB DDR4 2666MHz modules built to the PC4-21300 standard. Each stick is a 288-pin load-reduced DIMM with ECC, CL19 latency and 1.2V operation, designed for servers, workstations and compatible NAS systems that require registered memory with error correction.

Replaces lower-capacity or slower DDR4 LRDIMMs

The kit is backward-compatible with 2133MHz and 2400MHz DDR4 slots, so it can upgrade existing memory running at those speeds without platform changes. The jump is worth it when a workload needs the full 256GB capacity or the higher 2666MHz data rate, and the motherboard supports load-reduced ECC modules in a 4Rx4 configuration.

Fits 288-pin DDR4 server boards that accept LRDIMMs

Installation requires a platform that explicitly supports load-reduced ECC memory; it will not work with standard desktop boards or unbuffered DIMM slots. The eight-module layout fills eight DIMM slots in a dual-channel arrangement, freeing no extra slots but maximising the memory ceiling the board allows. No heat spreaders are fitted, so airflow in the chassis must handle the modules directly.

How it compares

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

Price $1,574.99
Pricier than about 84% of the 6,523 comparable items (median $188.99).
Total capacity 256 GB (8 × 32 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $6.15 per GB
Cheaper than about 62% 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 number2L6D44R4256K
Total capacity256 GB (8 × 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

Does the 288-pin DDR4 LRDIMM fit a standard server DIMM slot?

Yes, the 288-pin form factor matches standard DDR4 server DIMM slots that accept load-reduced modules.

What is the correct installation sequence for the eight 32GB modules in a dual-channel kit?

Populate identical modules in matching channel slots per the motherboard manual; the common error is mixing ranks or leaving a channel unbalanced.

When should the ECC load-reduced modules be replaced in a 24/7 server?

Replace modules if ECC correctable error counts rise sharply or the system logs uncorrectable memory errors during sustained operation.

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