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Four green DDR4 ECC UDIMM modules, 288-pin, no heat spreader

OWC

OWC 64GB (4×16GB) DDR4 2666 ECC UDIMM memory upgrade for ASUSTOR AS7112RDX AS7116RDX

SKU CH-N6PX-PBF2B

64 GB kit of four 16 GB DDR4 2666 ECC UDIMM modules for ASUSTOR AS7112RDX and AS7116RDX NAS systems

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8

Capacity 64GB (4 x 16GB)

  • 64GB total capacity from four 16GB modules for heavier workloads
  • DDR4 2666 speed rated at PC4-21300 for faster data throughput
  • ECC unbuffered design detects and corrects single-bit errors automatically
  • JEDEC and RoHS compliant for warranty-safe operation in ASUSTOR AS7112RDX and AS7116RDX
  • Backward compatible with 2133MHz and 2400MHz systems for flexible deployment

Tailored 64 GB kit for ASUSTOR NAS

This OWC kit delivers 64 GB of DDR4 2666 memory in four 16 GB unbuffered ECC UDIMMs built specifically for the ASUSTOR AS7112RDX and AS7116RDX LOCKERSTOR models. It targets administrators who need the maximum supported capacity for virtualisation, container workloads or large ZFS pools.

Fills every slot with validated modules

Each 288-pin DIMM runs at 1.2 V with CL19 timing and 2Rx8 organisation, matching the JEDEC PC4-21300 standard the NAS firmware expects. The kit occupies all four memory channels so no slots remain free, and the modules are backward compatible with 2133 MHz and 2400 MHz operation if the system downclocks automatically.

Steady throughput with error correction

ECC circuitry detects and corrects single-bit errors during extended file transfers, scrub jobs or database commits, preventing silent data corruption. Unbuffered design keeps latency low while the 1.2 V rating limits heat output, so the modules maintain rated 2666 MHz speeds throughout multi-hour workloads without thermal throttling.

How it compares

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

Price $512.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $8.02 per GB
Typical for this category: the median of 20,941 items is $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 number2E6D42R8064S
Total capacity64 GB (4 × 16 GB)
Product type288-Pin DDR4 ECC 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 systemsASUSTOR AS7112RDX
ASUSTOR AS7116RDX

Other versions of this model

5 more in the same range

Questions about this item

Will the CL19 latency become a bottleneck during sustained workloads?

CL19 is the rated CAS latency for these DDR4 2666 modules; latency does not change under load, so the limit you see first is the 2666 MT/s bandwidth ceiling.

How much heat and power do four 16 GB sticks draw when the NAS runs 24/7?

Each module runs at 1.2 V without a heat spreader; total kit power stays within standard DDR4 UDIMM limits and passive airflow in the ASUSTOR chassis is sufficient.

Do I need to populate all four DIMM slots for this kit to work in my AS7112RDX?

The AS7112RDX and AS7116RDX support four UDIMM slots; the kit is designed to fill all four, but the system will also run with fewer modules installed.

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