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Four green 240-pin DDR3L ECC registered DIMMs in static bags

OWC

OWC 64GB (4x16GB) DDR3L 1066 PC3L-8500 CL7 2Rx4 240-pin 1.35V ECC Registered DIMM server RAM

SKU CH-CZSK-3D3Y0

ECC registered DDR3L kit adds 64 GB across four 16 GB modules at 1066 MHz for servers and workstations

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR3L 1066 (PC3L 8500)
  • CAS latencyCL7
  • Rated voltage1.35 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 64GB (4 x 16GB)

Rank 2Rx4

  • 64 GB total capacity across four 16 GB modules
  • DDR3L 1066 MHz speed with CL7 latency for responsive server workloads
  • ECC registered design detects and corrects data errors in critical systems
  • Low 1.35 V operation reduces power draw and heat in dense configurations
  • JEDEC and RoHS compliant for broad workstation, server and NAS compatibility

64GB DDR3L ECC Registered Kit

This OWC kit supplies 64GB of DDR3L ECC Registered memory in four 16GB modules. It runs at 1066MHz with CL7 latency and operates at 1.35V. The 240-pin DIMMs are built for workstations, servers, NAS systems and routers that require registered error-correcting memory.

Upgrading from Unbuffered or Lower Capacity

The kit replaces unbuffered or non-ECC modules that cannot run in registered-only platforms. It also upgrades systems limited to smaller registered DIMMs, letting you populate four slots with 16GB each for a total of 64GB. The jump is worth it when your board demands registered ECC and you need the maximum supported density per slot.

For Registered ECC Platforms Only

This memory suits administrators extending the life of older DDR3L server infrastructure or building cost-effective replacements. It will not work in standard desktop computers or any system that requires unbuffered memory. Buyers who need higher speeds, different voltages or non-ECC modules should look elsewhere.

How it compares

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

Price $189.99
Typical for this category: the median of 6,523 items is $188.99.
Total capacity 64 GB (4 × 16 GB)
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $2.97 per GB
Cheaper than about 90% of the 6,064 comparable items (median $7.25 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 number8R5T32R4064S
Total capacity64 GB (4 × 16 GB)
Product type240-Pin DDR3L ECC RDIMM
Performance
Rated speedDDR3L 1066 (PC3L 8500)
Memory
CAS latencyCL7
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.35 V

Other versions of this model

5 more in the same range

Questions about this item

Does this 240-pin DDR3L RDIMM fit a standard 240-pin DDR3 server slot?

Yes, the modules use the 240-pin DDR3L form factor that matches standard DDR3 registered DIMM slots in compatible workstations and servers.

What is the correct installation sequence for this quad-channel 4×16 GB kit?

Populate the four modules in the motherboard's designated channel pairs, matching the same-coloured slots, and ensure each module clicks fully into the retaining clips.

When should I consider replacing these 1.35 V ECC registered modules?

Replace them if the system logs uncorrectable ECC errors, fails memory diagnostics, or becomes unstable under sustained load.

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