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Eight black DDR4 UDIMM modules with gold contacts no heat spreaders

OWC

OWC 128GB (8x16GB) DDR4 2666MHz CL19 ECC Unbuffered UDIMM 1.2V 288-pin desktop RAM

SKU CH-CV83-2SC0E

An eight-module kit provides 128 GB of DDR4 ECC unbuffered memory at 2666 MHz CL19 for workstations, servers and NAS systems

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Kit configurationDual Channel Kit

Capacity 128GB (8 x 16GB)

  • 128 GB total capacity from eight 16 GB modules
  • DDR4 2666 MHz CL19 for responsive workstation performance
  • ECC unbuffered design protects data integrity in servers and NAS
  • 2 V JEDEC-standard voltage keeps power draw low
  • Backward compatible with 2133 MHz and 2400 MHz systems

128GB DDR4 ECC Kit

This OWC kit provides 128GB of DDR4 memory across eight 16GB unbuffered UDIMM modules. It targets workstations, servers and NAS systems that require error-correcting code for data integrity. The modules run at 2666MHz with CL19 latency and operate at 1.2V.

Installation Notes

The 288-pin DIMMs fit standard desktop slots and are backward compatible with 2133MHz and 2400MHz platforms. No heat spreaders are present, so clearance is minimal. The main risk is populating all eight slots on a consumer board that only supports four or six modules per channel.

Sustained Load Behaviour

Under continuous workloads the JEDEC-compliant modules maintain their rated 2666MHz speed without thermal throttling because they lack spreaders and run at the standard 1.2V. ECC operation corrects single-bit errors in real time, preventing silent data corruption during long compute or storage tasks.

How it compares

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

Price $945.99
Pricier than about 90% of the 3,647 comparable items (median $90.99).
Total capacity 128 GB (8 × 16 GB)
Higher than about 93% of the 3,251 comparable items (median 16 GB).
Price per GB $7.39 per GB
Pricier than about 54% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameOWC
Part number2E6D42R8128K
Total capacity128 GB (8 × 16 GB)
Product colorBlack
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Recommended forWorkstations, Servers, and NAS Systems
More details
LED lightingNone

Other versions of this model

5 more in the same range

Questions about this item

Will this kit work in a motherboard that only supports 2133MHz or 2400MHz DDR4?

Yes, the modules are backward compatible with 2133MHz and 2400MHz speeds and will run at the highest speed the motherboard allows.

Does this ECC unbuffered memory require a workstation or server CPU to function?

ECC unbuffered DIMMs need a platform that supports ECC; many consumer desktop chipsets do not enable it, so verify your CPU and motherboard specifications first.

How many DIMM slots are needed to install the full 128GB kit?

The kit contains eight 16GB modules, so eight free 288-pin DDR4 slots are required to populate the entire set.

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