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Two green 240-pin DDR3 ECC registered DIMMs with black chips

OWC

OWC 16GB (2x8GB) DDR3 1066 PC3-8500 CL7 4Rx8 240-pin 1.5V ECC Registered RDIMM Kit

SKU CH-ASR4-3RW7B

A 16 GB dual-channel DDR3 ECC registered RDIMM kit for servers and workstations

  • Capacity16GB (2 x 8GB)
  • Type240-Pin DDR3 ECC RDIMM
  • SpeedDDR3 1066 (PC3 8500)
  • CAS LatencyCL7
  • Voltage1.5V
  • ECCYes

Capacity 16GB (2 x 8GB)

  • ECC registered design protects data integrity in servers
  • 16GB dual-channel kit boosts multitasking capacity
  • DDR3 1066 CL7 timing matches legacy system specs
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • 240-pin 1.5V RDIMM fits select workstation slots

ECC Registered DDR3 Server Kit

This OWC kit delivers 16 GB of DDR3 ECC registered memory in a matched pair of 8 GB modules. It operates at 1066 MHz with a CL7 latency and runs at 1.5 V. The 240-pin RDIMMs are built to JEDEC standards for reliable operation in compatible workstations and servers.

Compatibility Constraints

These modules are designed strictly for systems that accept DDR3 ECC registered DIMMs, such as select workstations, servers, NAS units and routers. They will not function in standard desktop computers or laptops that require unbuffered non-ECC memory, and they cannot be mixed with unbuffered modules in the same platform.

Registered ECC Architecture

The registered buffer and ECC circuitry provide the data integrity and signal stability required by multi-socket server chipsets. This specification is the decisive factor; if your hardware demands registered ECC DDR3, this kit meets that requirement, otherwise it will not post.

Highlights

  • ECC registered design protects data integrity in servers
  • 16GB dual-channel kit boosts multitasking capacity
  • DDR3 1066 CL7 timing matches legacy system specs
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • 240-pin 1.5V RDIMM fits select workstation slots

Specifications

BrandOWC
Part Number8R5D34R8016P
Capacity16GB (2 x 8GB)
Type240-Pin DDR3 ECC RDIMM
SpeedDDR3 1066 (PC3 8500)
CAS LatencyCL7
Voltage1.5V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx8
Multi-channel KitDual Channel Kit
Heat SpreaderNo

Other versions of this model

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Questions about this item

Does my server need 240-pin DDR3 slots that support ECC registered RDIMMs to use this kit?

Yes, this kit consists of two 8 GB 240-pin DDR3 1066 CL7 1.5 V ECC registered RDIMMs; the motherboard must accept DDR3 registered ECC memory in a dual-channel configuration.

Can I add these modules alongside existing unbuffered DDR3 DIMMs in the same system?

No, the manufacturer states this registered ECC memory cannot be mixed with unbuffered modules; all slots must use registered ECC DIMMs for the system to operate correctly.

How can I verify the kit is running at the rated 1066 MT/s with CL7 timings after installation?

Check the BIOS or a system-information utility such as CPU-Z; it should report each module at 1066 MT/s (PC3-8500) with CAS latency 7 and 1.5 V operation.

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