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Four green DDR3L RDIMM modules with gold contacts and black chips

OWC

OWC 1R6T32R4064S 64GB (4x16GB) DDR3L 1600 ECC RDIMM Supermicro X9DBU X9DR3 X9DR7 X9DRD X9DRE memory upgrade

SKU CH-CQER-1WJT5

64 GB DDR3L 1600 ECC registered kit of four 16 GB 240-pin RDIMMs for Supermicro X9DBU, X9DR3, X9DR7, X9DRD and X9DRE motherboards

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR3L 1600 (PC3L 12800)
  • CAS latencyCL11
  • Rated voltage1.35 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 64GB (4 x 16GB)

  • ECC registered design protects data integrity in server workloads
  • 64 GB kit expands capacity across four 16 GB modules
  • DDR3L 1600 speed matches PC3L-12800 platform specification
  • 35 V operation reduces power draw versus standard DDR3
  • Validated for Supermicro X9DBU, X9DR3, X9DR7, X9DRD, X9DRE motherboards

Server-grade DDR3L ECC RDIMM kit

This 64GB kit contains four 16GB DDR3L 1600 registered DIMMs built for Supermicro X9DBU, X9DR3, X9DR7, X9DRD and X9DRE motherboards. Each module runs at 1.35V with CL11 latency and 2Rx4 organisation. ECC and registered buffering make it suitable for workstation, server, NAS and router platforms that require error-correcting memory.

64GB capacity with four DIMM slots

The kit fills four slots with 16GB modules, giving 64GB total capacity for multi-threaded workloads and large datasets. Registered signalling and ECC overhead reduce usable bandwidth slightly compared to unbuffered memory, so extremely latency-sensitive tasks may see less benefit. Systems needing more than 64GB or higher clock speeds will require a different platform.

Low-voltage operation at 1.35V

DDR3L voltage reduces power draw and heat output compared to standard 1.5V DDR3, helping keep server chassis temperatures lower under sustained load. Modules have no heat spreaders, so adequate case airflow is needed to maintain stable thermals. Registered buffers add negligible acoustic noise in typical rack or tower environments.

How it compares

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

Price $180.99
Cheaper than about 59% of the 21,161 comparable items (median $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 $2.83 per GB
Cheaper than about 90% 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 number1R6T32R4064S
Total capacity64 GB (4 × 16 GB)
Product type240-Pin DDR3L ECC RDIMM
Performance
Rated speedDDR3L 1600 (PC3L 12800)
Memory
CAS latencyCL11
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.35 V
Compatibility
Compatible systemsSupermicro Motherboard X9DBU Series
Supermicro Motherboard X9DR3 Series
Supermicro Motherboard X9DR7 Series
Supermicro Motherboard X9DRD Series
Supermicro Motherboard X9DRE Series

Other versions of this model

5 more in the same range

Questions about this item

Will these 1.35 V DDR3L RDIMMs run correctly alongside the 1.5 V DDR3 modules already in my Supermicro X9DRE board?

No — registered ECC DDR3L at 1.35 V cannot be mixed with unbuffered or 1.5 V DDR3; the board requires all slots to use identical registered DDR3L modules.

How can I confirm the kit is running at 1600 MHz CL11 with ECC active after installation?

Enter the BIOS or use a tool such as dmidecode / CPU-Z; each of the four 16 GB modules should show PC3L-12800, CL11, 1.35 V and ECC Registered.

Does the 64 GB kit include only the four 240-pin RDIMMs or are any cables or brackets supplied?

The box contains only the four 16 GB 240-pin DDR3L ECC registered modules; no cables, brackets or additional hardware are included.

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