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

OWC

OWC 16GB DDR4 2666 ECC Registered RDIMM server RAM

SKU CH-8HKP-97C7W

A 16 GB DDR4-2666 ECC registered DIMM for servers, workstations and compatible NAS systems

  • Capacity16GB
  • Type288-Pin DDR4 SDRAM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes

Capacity 16GB

  • ECC registered design protects data integrity in servers
  • 16 GB capacity expands memory for demanding workloads
  • DDR4 2666 MHz speed matches PC4-21300 bandwidth
  • 2 V operation reduces power draw per module
  • Backward compatible with 2133 MHz and 2400 MHz systems

OWC 16GB DDR4 2666 ECC RDIMM

This 16GB DDR4 2666 MHz PC4-21300 ECC Registered RDIMM is built for servers, workstations and compatible NAS systems such as the Synology SA6400. It delivers error-correcting registered memory for workloads that demand data integrity.

Verify platform compatibility before ordering

Your motherboard or NAS must support DDR4 ECC Registered RDIMMs; this module will not work in standard desktop computers that require unbuffered memory. It also cannot be mixed with unbuffered or load-reduced ECC DIMMs, so confirm the existing population rules for your specific system.

JEDEC-standard build with registered buffer

The 288-pin module operates at 1.2V with CL19 latency and a 2Rx4 organisation, conforming to JEDEC and RoHS standards. No heat spreader is fitted, allowing dense DIMM spacing in qualified server and NAS chassis. Backward compatibility with 2133 MHz and 2400 MHz systems is supported.

Highlights

  • ECC registered design protects data integrity in servers
  • 16 GB capacity expands memory for demanding workloads
  • DDR4 2666 MHz speed matches PC4-21300 bandwidth
  • 2 V operation reduces power draw per module
  • Backward compatible with 2133 MHz and 2400 MHz systems

Specifications

BrandOWC
Part Number2R6D42R416GB
Capacity16GB
Type288-Pin DDR4 SDRAM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Does the module ship as a single 16GB stick or do I need to order a kit?

The upgrade consists of one 16GB DDR4 2666 PC4-21300 CL19 2Rx4 288-pin 1.2V ECC Registered DIMM; no additional modules are included.

Should I pick the 2666MHz CL19 version or a faster speed for my Synology SA6400?

This module runs at 2666MHz CL19 and is backward compatible with 2133MHz and 2400MHz systems, matching the SA6400 specification.

What does the 2666MHz PC4-21300 rating actually deliver inside a registered server chassis?

It provides 16GB of ECC Registered DDR4 bandwidth at 2666MT/s with CL19 latency, operating at 1.2V in a 288-pin RDIMM form factor.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.