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Eight black DDR3 UDIMM modules in a row

OWC

OWC 8E5D32R8064K 64GB (8x8GB) DDR3 1066 CL7 ECC Unbuffered UDIMM

SKU CH-JTNB-RS33Y

Eight 8 GB DDR3-1066 CL7 ECC unbuffered DIMMs deliver 64 GB at 1.5 V for workstations, servers and NAS systems

  • Total capacity64 GB (8 × 8 GB)
  • Rated speedDDR3 1066 (PC3 8500)
  • CAS latencyCL7
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • Kit configurationDual Channel Kit

Capacity 64GB (8 x 8GB)

  • 64 GB total capacity across eight 8 GB modules
  • DDR3 1066 speed with CL7 latency for responsive multitasking
  • ECC unbuffered design protects data integrity in workstations and servers
  • JEDEC-standard 1.5 V operation ensures broad platform compatibility
  • 240-pin UDIMM form factor fits standard desktop and server slots

64GB DDR3 ECC kit for workstations

This OWC kit supplies 64GB of DDR3 1066 memory in eight 8GB unbuffered UDIMMs. ECC protection and CL7 latency suit workstations, servers and NAS systems that require data integrity. The modules run at the standard 1.5V JEDEC voltage.

Sustained load stability with ECC

Error-correcting code detects and corrects single-bit errors during continuous operation, preventing silent data corruption in long-running tasks. Unbuffered topology keeps latency low while the CL7 timing supports steady throughput. JEDEC compliance ensures consistent behaviour across extended sessions.

240-pin UDIMM layout for broad compatibility

Each module uses the 240-pin DDR3 form factor without a heat spreader, allowing tight slot spacing in multi-channel configurations. Black PCB and standard height simplify installation in dense server or workstation chassis. The eight-module kit populates all channels for balanced bandwidth.

How it compares

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

Price $211.99
Pricier than about 69% of the 3,647 comparable items (median $90.99).
Total capacity 64 GB (8 × 8 GB)
Higher than about 90% of the 3,251 comparable items (median 16 GB).
Price per GB $3.31 per GB
Cheaper than about 90% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameOWC
Part number8E5D32R8064K
Total capacity64 GB (8 × 8 GB)
Product colorBlack
Performance
Rated speedDDR3 1066 (PC3 8500)
Memory
CAS latencyCL7
ECC supportYes
Buffer typeUnbuffered
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Recommended forWorkstations, Servers, and NAS Systems
More details
LED lightingNone

Other versions of this model

5 more in the same range

Questions about this item

Will these modules fit a motherboard that only accepts 240-pin DDR3 DIMMs?

Yes, each stick is a 240-pin DDR3 UDIMM, so it matches that slot type exactly.

Can I install this 64GB kit in a system limited to 32GB maximum memory?

No, the kit provides 64GB total; a 32GB limit would prevent full use of all eight modules.

Does the CL7 latency at 1066MHz require manual BIOS timing changes?

The modules are JEDEC-standard PC3-8500 CL7 parts, so they should configure automatically at rated speed.

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