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Green circuit board with black memory chips and gold edge connector

OWC

OWC 8GB DDR3 1066 PC3-8500 CL7 4Rx8 240-pin 1.5V ECC Registered RDIMM server RAM

SKU CH-C79S-F2SH1

An 8 GB DDR3 1066 ECC registered RDIMM for workstations, servers and NAS systems

  • Capacity8GB
  • Type240-Pin DDR3 ECC RDIMM
  • SpeedDDR3 1066 (PC3 8500)
  • CAS LatencyCL7
  • Voltage1.5V
  • ECCYes

Capacity 8GB

  • ECC registered design protects data integrity in servers
  • 8 GB capacity adds memory headroom for virtualisation
  • 1066 MHz DDR3 speed matches PC3-8500 platforms
  • 240-pin RDIMM form factor fits registered DIMM slots
  • 5 V operation meets JEDEC standard for registered modules

Server ECC RDIMM Upgrade

This OWC module provides 8GB of DDR3 ECC Registered memory built for workstations, servers and compatible NAS or router platforms. It operates at 1066MHz with a CL7 latency and uses a 240-pin form factor. The 4Rx8 organisation and 1.5V rating match JEDEC PC3-8500 specifications for registered DIMMs.

Registered ECC Interface Constraints

Registered DIMMs place a register between the DRAM and the memory controller, which buffers address and command signals to reduce electrical load. This design allows larger memory capacities per channel but adds one clock cycle of latency compared with unbuffered modules. The module will only function in systems whose chipset and BIOS explicitly support registered ECC operation.

Pre-Installation Verification

Confirm that your platform accepts DDR3 Registered ECC RDIMMs and does not require unbuffered or non-ECC memory, as the two types cannot be mixed. Verify the motherboard or system documentation for supported speeds, maximum capacity per slot and total population limits. Ensure the operating voltage requirement matches the 1.5V or 1.35V specification before ordering.

Highlights

  • ECC registered design protects data integrity in servers
  • 8 GB capacity adds memory headroom for virtualisation
  • 1066 MHz DDR3 speed matches PC3-8500 platforms
  • 240-pin RDIMM form factor fits registered DIMM slots
  • 5 V operation meets JEDEC standard for registered modules

Specifications

BrandOWC
Part Number8R5D34R808GB
Capacity8GB
Type240-Pin DDR3 ECC RDIMM
SpeedDDR3 1066 (PC3 8500)
CAS LatencyCL7
Voltage1.5V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx8
Heat SpreaderNo

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Questions about this item

Should I choose the 8GB 4Rx8 module or look for a different rank configuration?

This is a single 8GB DDR3 1066 PC3-8500 CL7 4Rx8 240-pin 1.5V ECC Registered RDIMM. The 4Rx8 organisation suits server platforms that require registered ECC memory.

What does the 1066 MHz speed deliver in a server workload?

The module operates at 1066 MHz with CL7 timing, providing DDR3 1066 bandwidth for compatible workstations and servers.

Is the 240-pin DDR3 interface limited to 1.5 V or can it run at 1.35 V?

The module is specified at 1.5 V. The supplier specification sheet also lists 1.35 V for the same PC3L-8500 speed grade.

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