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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

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Recommended forWorkstations, Servers, and NAS Systems
  • 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.

How it compares

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

Price $165.99
Pricier than about 63% of the 3,647 comparable items (median $90.99).
Total capacity 16 GB
Typical for this category: the median of 3,251 items is 16 GB.
Price per GB $10.37 per GB
Pricier than about 68% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameOWC
Part number2E6V42R816 GB
Total capacity16 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Recommended forWorkstations, Servers, and NAS Systems
More details
LED lightingNone

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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