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Eight green 240-pin DDR3 RDIMM modules in a row

OWC

OWC 128GB (8x16GB) DDR3 1066 PC3-8500 CL7 2Rx4 240-pin 1.5V ECC Registered RDIMM server RAM

SKU CH-XE3N-AGSW4

Eight 16 GB DDR3 ECC registered RDIMMs at 1066 MHz CL7 deliver 128 GB for servers and workstations

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR3 1066 (PC3 8500)
  • CAS latencyCL7
  • Rated voltage1.5 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 128GB (8 x 16GB)

Rank 2Rx4

  • 128 GB total capacity from eight 16 GB modules
  • DDR3 1066 MHz speed with CL7 latency for responsive server workloads
  • ECC registered design detects and corrects data errors in critical applications
  • 240-pin RDIMM form factor fits compatible workstation and server slots
  • JEDEC and RoHS compliant for warranty-safe upgrades

Server-grade ECC registered memory kit

This OWC kit provides 128 GB of DDR3 server memory across eight 16 GB registered DIMMs. It is built for workstations and servers that require error-correcting code and registered buffering. Standard desktop systems cannot use these modules.

Upgrading from unbuffered or lower-capacity DDR3

The jump is worthwhile when your workload demands ECC protection and the motherboard supports registered DIMMs. Mixing these modules with unbuffered memory is not supported and will prevent boot.

Verify registered DIMM support and voltage

Confirm the system accepts 240-pin DDR3 registered ECC modules at the rated speed. Some platforms require 1.35 V operation; others need 1.5 V. Check the motherboard manual for qualified memory lists before ordering.

How it compares

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

Price $370.99
Pricier than about 64% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB (8 × 16 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $2.90 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 number8R5D32R4128K
Total capacity128 GB (8 × 16 GB)
Product type240-Pin DDR3 ECC RDIMM
Performance
Rated speedDDR3 1066 (PC3 8500)
Memory
CAS latencyCL7
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
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

Will the 240-pin DDR3 RDIMM modules fit my server motherboard slots?

Yes, each 16GB module uses the standard 240-pin DDR3 RDIMM form factor designed for compatible server and workstation boards.

What is the correct way to populate all eight modules for dual-channel operation?

Install the 8 modules in matched pairs across the motherboard's channel slots following the manufacturer's population guide; mixing with unbuffered DIMMs will prevent boot.

Does the 1.5V or 1.35V specification affect long-term reliability in a 24/7 server?

The kit is rated at 1.5V; running at the rated voltage within JEDEC limits ensures stable 24/7 operation without accelerated wear.

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