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Green circuit board with black memory chips, no heat spreader, 288 gold pins along bottom edge

OWC

OWC 16GB DDR4 2666 ECC Unbuffered DIMM desktop RAM

SKU CH-XH4H-184S4

16 GB DDR4 2666 ECC unbuffered DIMM with CL19 latency and 1.2 V operation for workstations, servers and NAS systems

  • Capacity16GB
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes
  • Buffered/RegisteredUnbuffered
  • 16 GB capacity expands multitasking headroom for workstations and NAS
  • DDR4 2666 speed delivers 21300 MT/s bandwidth for demanding workloads
  • CL19 latency at 1.2 V keeps response tight and power draw low
  • ECC unbuffered design protects data integrity in servers and NAS
  • JEDEC and RoHS compliant module ensures warranty-safe upgrades

16GB DDR4 2666 ECC Module

This 16GB DDR4 2666 module adds error-correcting memory to compatible workstations, servers and NAS systems. It runs at PC4-21300 speed with a CL19 latency and operates at 1.2V. The unbuffered design suits platforms that require ECC without registered signalling.

JEDEC Compliant VLP DIMM

The 288-pin VLP form factor fits standard DDR4 slots while meeting JEDEC and ROHS specifications. A 2Rx8 organisation provides density without a heat spreader, keeping the profile low for tight chassis. OWC tests every unit in-house to ensure warranty-safe operation.

Low Voltage Thermal Profile

At 1.2V the module draws minimal power and generates little heat during typical workloads. The absence of a spreader means airflow from case fans passes directly over the DRAM. Silent operation is assured because no active cooling is required.

Highlights

  • 16 GB capacity expands multitasking headroom for workstations and NAS
  • DDR4 2666 speed delivers 21300 MT/s bandwidth for demanding workloads
  • CL19 latency at 1.2 V keeps response tight and power draw low
  • ECC unbuffered design protects data integrity in servers and NAS
  • JEDEC and RoHS compliant module ensures warranty-safe upgrades

Specifications

BrandOWC
Part Number2E6V42R816GB
Capacity16GB
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredUnbuffered
Heat SpreaderNo
Recommend UseWorkstations, Servers, and NAS Systems
LED ColorNone

Questions about this item

Will this 16 GB DDR4 2666 module work in a motherboard that only supports non-ECC memory?

No — the module includes ECC circuitry and is designed for platforms that specifically support error-correcting memory; a non-ECC board will not recognise it.

Does the 288-pin VLP form factor fit standard desktop DIMM slots?

Yes — the 288-pin layout matches the desktop DDR4 socket, and the very-low-profile height clears most CPU coolers without interference.

Can I mix this stick with existing non-ECC DDR4 2666 modules?

Mixing ECC and non-ECC modules is not supported; the system will either disable ECC or fail to boot, so all slots should use identical ECC unbuffered DIMMs.

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