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Green rectangular circuit board with gold contacts and black memory chips

OWC

OWC 16GB DDR4 2666 PC4-21300 CL19 2Rx8 VLP ECC UDIMM 5019C-MHN2 5029C-T 5039MC-H8TRF memory upgrade

SKU CH-7H1R-7X5MJ

16 GB DDR4 2666 ECC VLP UDIMM for Supermicro SuperServer 5019C-MHN2, 5029C-T and 5039MC-H8TRF

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • 16 GB DDR4 2666 CL19 ECC UDIMM for Supermicro servers
  • Very low profile 288-pin design fits space-constrained 1U chassis
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • Unbuffered 2Rx8 organisation at 1.2 V for stable operation
  • Tested to meet OEM specs on X11SSW motherboards

Targeted Server Memory Upgrade

This 16GB DDR4 module is built for Supermicro SuperServer 5019C-MHN2, 5029C-T and 5039MC-H8TRF systems. It also fits Supermicro X11SSW-F and X11SSW-TF motherboards. The kit provides a single 288-pin VLP ECC UDIMM for administrators expanding capacity in compatible rackmount or tower servers.

DDR4 2666 JEDEC Limits

The module runs at 2666 MT/s with CL19 latency at the standard 1.2 V JEDEC voltage. ECC protection corrects single-bit errors, which is required for the target Supermicro platforms. Unbuffered 2Rx8 organisation means the memory controller sees two ranks per DIMM; total rank count per channel must stay within the motherboard limit. Builders who need registered or load-reduced DIMMs cannot use this part.

Replaces Lower-Capacity DDR4 DIMMs

Swapping out 8GB or smaller DDR4 2666 sticks for this 16GB module doubles density per slot without changing voltage or speed. The upgrade is worth it when the server hits memory pressure during virtualization, database caching or multi-user workloads. Systems already populated with maximum supported DIMMs per channel cannot accept additional modules.

How it compares

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

Price $168.99
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 $10.56 per GB
Pricier than about 54% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

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 5019C-MHN2
Supermicro SuperServer 5029C-T
Supermicro SuperServer 5039MC-H8TRF
Supermicro Motherboard X11SSW-F
Supermicro Motherboard X11SSW-TF

Questions about this item

Should I pick the 16GB module or add multiple sticks for my Supermicro SuperServer?

The module is a single 16GB DDR4 2666 stick. OWC recommends matching capacity, speed and manufacturer across all slots, so add identical 16GB modules to reach your desired total.

What does the PC4-21300 rating deliver in my SuperServer 5019C-MHN2?

PC4-21300 means 2666 MT/s peak bandwidth. In your SuperServer the memory will run at that speed with CL19 latency, giving the throughput the platform expects from DDR4 2666 ECC UDIMMs.

Is the 288-pin DDR4 ECC UDIMM keyed differently from registered DIMMs?

Yes. This is a 288-pin unbuffered ECC UDIMM (2Rx8, 1.2 V, VLP). It fits standard DDR4 UDIMM slots on the X11SSW-F and X11SSW-TF boards; registered DIMMs use a different key and will not seat.

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