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Green circuit board with black memory chips and gold edge connectors

OWC

OWC 8R5D32R408GB 8GB DDR3 1066 PC3-8500 CL7 2Rx4 240-pin 1.5V ECC Registered RDIMM server RAM

SKU CH-7PGA-AN4VW

Adds 8 GB of DDR3 1066 ECC registered server memory with CL7 latency and 1.5 V operation

  • Total capacity8 GB
  • Rated speedDDR3 1066 (PC3 8500)
  • CAS latencyCL7
  • Rated voltage1.5 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 8GB

Rank 2Rx4

  • ECC registered design protects data integrity in critical workloads
  • 8 GB capacity extends memory headroom for virtualization and databases
  • DDR3 1066 CL7 timing matches JEDEC PC3-8500 specification
  • Registered 2Rx4 architecture supports high-density server configurations
  • 5 V operation aligns with standard DDR3 server power envelopes

Server ECC RDIMM for Workstations

This OWC module is an 8GB DDR3 ECC Registered DIMM built for workstations, servers, NAS systems and routers. It uses a 240-pin form factor and operates at 1066 MHz with a CL7 latency. The registered buffer and error-correcting code protect data integrity in multi-socket or mission-critical environments. It will not work in standard desktop computers that require unbuffered memory.

Registered Buffer and ECC Compatibility

The single specification that decides fitment is the registered ECC design. Only platforms whose memory controller explicitly supports registered modules with ECC can use this DIMM. Mixing it with unbuffered memory is not supported and will prevent boot. Verify the system manual or vendor qualification list for registered DDR3 1066 support before purchase.

JEDEC Standard Module Without Extras

The module ships as a bare JEDEC-compliant DIMM with no heat spreader, cables, software licences or mounting hardware. Installation is a direct plug-in upgrade for qualified slots. The absence of bundled accessories keeps the cost low for administrators expanding existing infrastructure or building new servers.

How it compares

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

Price $21.99
Cheaper than about 94% of the 6,523 comparable items (median $188.99).
Total capacity 8 GB
Lower than about 80% of the 6,064 comparable items (median 32 GB).
Price per GB $2.75 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 number8R5D32R408 GB
Total capacity8 GB
Product type240-Pin DDR3 ECC RDIMM
Performance
Rated speedDDR3 1066 (PC3 8500)
Memory
CAS latencyCL7
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.5 V

Other versions of this model

5 more in the same range

Questions about this item

What does the PC3-8500 rating mean for actual throughput in my server?

PC3-8500 indicates a peak transfer rate of 8500 MB/s at 1066 MHz, so the module delivers up to that bandwidth when the memory controller runs at the rated speed.

How does the registered ECC interface affect what the system can use?

The registered ECC design adds a register between the DRAM and the memory controller, reducing electrical load so the platform can populate more slots while providing error correction for data integrity.

What physical slot and clearance does this 240-pin RDIMM require?

It fits a standard 240-pin DDR3 DIMM socket and has no heat spreader, so it occupies only the height of the bare PCB for tight server chassis clearance.

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