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Four green 240-pin DDR3 ECC registered DIMMs in static bags

OWC

OWC 128GB (4x32GB) DDR3 1066 PC3-8500 CL7 4Rx4 240-pin 1.5V ECC Registered RDIMM server RAM

SKU CH-WRF8-XHAVN

128 GB DDR3 ECC registered server memory kit, four 32 GB modules at 1066 MHz CL7

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR3 1066 (PC3 8500)
  • CAS latencyCL7
  • Rated voltage1.5 V
  • Buffer typeRegistered
  • Memory rank4Rx4

Capacity 128GB (4 x 32GB)

Rank 4Rx4

  • 128GB total capacity across four 32GB modules
  • DDR3 1066 speed rated at PC3-8500 with CL7 latency
  • ECC registered design detects and corrects data errors
  • 5V operating voltage for standard server DIMM slots
  • 240-pin RDIMM form factor fits compatible workstation and server boards

OWC 128GB DDR3-1066 ECC Registered Kit

This OWC kit supplies 128 GB of DDR3 server memory as four 32 GB registered DIMMs rated at 1066 MHz with CL7 latency. The modules operate at 1.5 V and carry ECC plus register buffering for data integrity in multi-socket platforms. They are built to JEDEC PC3-8500 specifications and use a 240-pin form factor.

Suited for workstation and server upgrades only

The registered ECC design makes these modules compatible with select workstations, servers, NAS systems and routers that require buffered memory. They will not function in standard desktop computers that accept only unbuffered non-ECC DIMMs, and they cannot be mixed with unbuffered memory in the same system.

Registered ECC with 4Rx4 organisation

Each 32 GB DIMM uses a 4Rx4 rank structure, so the memory controller must support quad-rank registered modules at DDR3-1066. Verify that your platform’s qualified-vendor list includes 4Rx4 registered parts before purchase, as some systems limit rank count or require specific voltage settings.

How it compares

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

Price $359.99
Pricier than about 64% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $2.81 per GB
Cheaper than about 90% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number8R5D34R4128S
Total capacity128 GB (4 × 32 GB)
Product type240-Pin DDR3 ECC RDIMM
Performance
Rated speedDDR3 1066 (PC3 8500)
Memory
CAS latencyCL7
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.5 V

Other versions of this model

5 more in the same range

Questions about this item

How do I install the 4Rx4 240-pin DDR3 RDIMMs in a dual-channel server, and what step is often missed?

Populate matching slots per channel, ensure the registered ECC modules click fully into the 240-pin sockets, and enable ECC in BIOS — the step most often missed is verifying the memory mode after POST.

What maintenance or replacement will the 128 GB DDR3 1066 kit need over its service life?

No scheduled maintenance is required; the modules have no heat spreaders to clean, and JEDEC-compliant DDR3 DRAM is rated for continuous operation — replacement only occurs if a module fails.

What limit appears first when the 1.5 V CL7 RDIMMs run sustained workloads?

The DDR3 1066 bandwidth ceiling is reached before thermal or voltage limits, capping throughput at the PC3-8500 data rate under continuous load.

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