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Eight green DDR3L ECC registered DIMMs in anti-static packaging

OWC

OWC 64GB (8x8GB) DDR3L 1333 ECC Registered RDIMM server RAM

SKU CH-74AR-A8RMC

A 64GB DDR3L ECC registered server memory kit containing eight 8GB modules running at 1333MHz with CL9 latency and 1.35V operation

  • Total capacity64 GB (8 × 8 GB)
  • Rated speedDDR3L 1333 (PC3L 10600)
  • CAS latencyCL9
  • Rated voltage1.35 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 64GB (8 x 8GB)

Rank 2Rx4

  • ECC registered design protects data integrity in servers
  • 64 GB kit with eight 8 GB modules expands capacity
  • DDR3L 1333 MHz CL9 at 1.35 V lowers power draw
  • 240-pin RDIMM form factor fits workstation and NAS slots
  • JEDEC and RoHS compliant for warranty-safe upgrades

Server memory kit for enterprise systems

This OWC kit delivers 64 GB of DDR3L registered ECC memory across eight 8 GB modules. It targets administrators upgrading workstations, servers, NAS appliances or routers that require 240-pin DDR3L RDIMMs. The kit is not suitable for standard desktop computers or any platform that accepts only unbuffered memory.

DDR3L 1333 registered interface limits

The modules operate at 1333 MHz with a CL9 latency and a 1.35 V supply. Registered buffering adds one clock cycle of address/command delay, which is mandatory for the target platforms but prevents use in consumer boards that expect unbuffered DIMMs. Mixing these sticks with unbuffered memory is not supported and will cause instability.

Capacity headroom for multi-socket workloads

Eight modules provide 64 GB total, allowing population of all slots in many dual-channel server boards. The 2Rx4 organisation keeps electrical loading low per channel, helping signal integrity at full capacity. Systems that require more than 64 GB or faster than 1333 MHz will need a different memory generation or higher-density modules.

How it compares

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

Price $165.99
Typical for this category: the median of 6,523 items is $188.99.
Total capacity 64 GB (8 × 8 GB)
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $2.59 per GB
Cheaper than about 91% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number1R3T32R4064K
Total capacity64 GB (8 × 8 GB)
Product type240-Pin DDR3L ECC RDIMM
Performance
Rated speedDDR3L 1333 (PC3L 10600)
Memory
CAS latencyCL9
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

Should I choose the 64 GB kit with eight 8 GB modules or a smaller capacity for my server?

The kit provides 64 GB total across eight 8 GB DDR3L 1333 registered DIMMs. Use all eight slots for maximum capacity or populate fewer slots if your platform limits total memory or requires specific slot filling rules.

What does the 1333 MHz speed mean for actual throughput in a workstation?

At DDR3L 1333 (PC3L-10600) the modules deliver up to 10 600 MB/s peak bandwidth per channel. Real-world throughput depends on your CPU memory controller, channel population and BIOS settings.

How does the 240-pin DDR3L registered ECC interface limit compatibility?

These 240-pin DDR3L 1.35 V registered ECC RDIMMs only fit servers, workstations, NAS units or routers that explicitly support registered DDR3L memory. They will not work in standard desktop boards or unbuffered DDR3 slots.

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