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Green PCB memory module with gold contacts and black chips no heat spreader

OWC

OWC 16GB DDR4 2666 ECC VLP UDIMM 2Rx8 CL19 1.2V 288-pin 2E6V42R816GB

SKU CH-XFM5-2KW0M

16 GB DDR4 2666 ECC VLP UDIMM for compatible Supermicro SuperServer systems

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • ECC protection guards data integrity on critical workloads
  • 16 GB capacity adds headroom for multitasking
  • DDR4 2666 speed matches server platform specs
  • Very low profile fits dense MicroCloud chassis
  • Validated for Supermicro 5039 and 5019 series

Targeted Server Upgrade

This OWC module is a 16GB DDR4 2666 ECC VLP UDIMM built for specific Supermicro SuperServer MicroCloud and SuperServer systems. It fits the 5039MC-H12TRF, 5039MS-H12TRF, 5039MS-H8TRF, 5019S-WR and 5019S-MN4 platforms requiring unbuffered memory.

Capacity And Headroom

The single 16GB rank adds substantial memory for virtualization, container density or large datasets on supported dual-rank channels. Systems already populated to the board limit cannot accept this module without removing existing DIMMs.

Critical Compatibility Spec

This part is validated only for the listed Supermicro models using DDR4 2666 PC4-21300 CL19 1.2V 2Rx8 288-pin VLP ECC unbuffered DIMMs. It will not function in platforms requiring registered, non-ECC or different voltage memory.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $166.99
Cheaper than about 60% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $10.44 per GB
Pricier than about 54% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2E6V42R816 GB
Total capacity16 GB
Product type288-Pin DDR4 ECC VLP UDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSupermicro SuperServer MicroCloud 5039MC-H12TRF
Supermicro SuperServer MicroCloud 5039MS-H12TRF
Supermicro SuperServer MicroCloud 5039MS-H8TRF
Supermicro SuperServer 5019S-WR
Supermicro SuperServer 5019S-MN4

Questions about this item

Will this 16GB DDR4 2666 CL19 ECC VLP UDIMM run reliably alongside the 8GB sticks already in my Supermicro 5039MC-H12TRF?

OWC recommends matching capacity, speed and manufacturer for optimal performance. Mixing 16GB 2Rx8 modules with different ranks or timings can prevent the server from training memory at the rated 2666 MT/s.

How do I confirm the module is detected at DDR4 2666 with ECC active after installing it in a Supermicro 5019S-WR?

Enter the BIOS or use a hardware-information tool; the memory should report 2666 MT/s, CL19, 1.2 V and show ECC enabled for the 16GB DIMM.

Does the 2E6V42R816GB package include a heat spreader or any installation tools, or must I buy them separately?

The module ships without a heat spreader and no tools are included; installation requires only a compatible 288-pin DDR4 slot and standard anti-static precautions.

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