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Green 288-pin DDR4 RDIMM module with black chips, no heat spreader

OWC

OWC 16GB DDR4 2666 ECC Registered RDIMM 2Rx8 CL19 1.2V 288-Pin server RAM

SKU CH-68HD-XPP36

16 GB DDR4-2666 ECC registered RDIMM, CL19, 1.2 V, 2Rx8, 288-pin for servers

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx8
  • 16GB DDR4 2666 ECC RDIMM expands server memory capacity
  • Registered ECC design detects and corrects data errors
  • CL19 latency at 1.2V balances speed with power efficiency
  • 2Rx8 dual-rank organisation improves throughput on multi-channel boards
  • Compatible with 2133MHz and 2400MHz systems for flexible upgrades

16GB DDR4 2666 ECC Registered RDIMM

This 16GB DDR4 2666 module is an ECC registered RDIMM built for servers, workstations and NAS systems. It uses a 2Rx8 organisation and runs at 1.2V with a CL19 latency. The part is designed as a direct replacement for specific Hynix modules and meets JEDEC PC4-21300 specifications.

Check registered ECC support and rank compatibility

Verify that your system requires registered ECC memory and accepts 2Rx8 modules before ordering. This DIMM will not work in platforms that only support unbuffered non-ECC RAM and it cannot be mixed with unbuffered memory. The 288-pin form factor fits DDR4 slots that are qualified for registered operation.

Sustained operation at 2666 MHz with ECC overhead

Under continuous load the module maintains its 2666 MHz data rate while ECC correction handles single-bit errors without halting the system. Registered buffering reduces electrical loading on the memory controller, helping stability during long-running server workloads. The 1.2V operating voltage keeps power draw consistent across extended duty cycles.

How it compares

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

Price $98.99
Cheaper than about 70% of the 6,523 comparable items (median $188.99).
Total capacity 16 GB
Lower than about 60% of the 6,064 comparable items (median 32 GB).
Price per GB $6.19 per GB
Cheaper than about 62% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number2R6D42R816 GB
Total capacity16 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V

Questions about this item

Does the 288-pin DDR4 module arrive as a single stick, or do I need to purchase any brackets or cables separately?

The module ships as one 16 GB DDR4 2666 ECC registered RDIMM; no brackets, cables or additional parts are included or required for installation.

Should I choose the 2Rx8 16 GB version or a different capacity for my server?

This 16 GB 2Rx8 stick is the only capacity offered in this listing; select it when your system needs a single registered ECC module at 2666 MHz.

What does the 2666 MHz CL19 rating deliver once the DIMM is installed in a compatible server?

The module runs at 2666 MHz with CL19 latency at 1.2 V, providing JEDEC-standard ECC registered performance for server, workstation or NAS workloads.

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