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Four green DDR5 RDIMM modules in a row

OWC

OWC 128GB (4x32GB) DDR5 5600 CL46 ECC Registered RDIMM server RAM

SKU CH-SAH0-K9T9S

Four 32 GB DDR5 5600 CL46 ECC registered RDIMMs totalling 128 GB at 1.1 V for servers and workstations

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • CAS latencyCL46
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx8

Capacity 128GB (4 x 32GB)

Show 4 more

Rank 2Rx8

  • 128 GB total capacity across four 32 GB modules
  • DDR5 5600 speed with CL46 latency for responsive server workloads
  • ECC registered design detects and corrects data errors in critical applications
  • JEDEC-standard 1.1 V operation ensures broad workstation compatibility
  • 2Rx8 dual-rank organisation maximises memory density per channel

128GB DDR5 ECC RDIMM kit

This OWC kit supplies 128GB of DDR5 5600 registered ECC memory across four 32GB modules. Each DIMM runs at CL46 latency and 1.1V, conforming to JEDEC PC5-44800 specifications. The 288-pin RDIMM form factor is intended for compatible workstations and servers that require registered error-correcting memory.

Suited for registered-ECC platforms only

The modules are built for systems that accept DDR5 2Rx8 registered DIMMs and cannot be used in standard desktop PCs or mixed with unbuffered or load-reduced ECC memory. Buyers who need non-ECC consumer memory or a different form factor should look at other product lines.

Verify DDR5 RDIMM support first

Before ordering, confirm that your workstation or server motherboard supports DDR5 5600 registered ECC RDIMMs and can populate four slots in the required channel configuration. Check the system documentation for maximum capacity per slot and qualified vendor lists to ensure compatibility.

How it compares

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

Price $3,171.99
Pricier than about 90% 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 $24.78 per GB
Pricier than about 86% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number5R6D52R8128S
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
CAS latencyCL46
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.1 V

Other versions of this model

5 more in the same range

Questions about this item

What type of system do I need to install these 288-pin DDR5 ECC RDIMM modules?

They require a workstation or server motherboard that supports DDR5 5600 registered ECC memory; standard desktop boards will not accept them.

Can I add this 128GB kit alongside existing unbuffered or load-reduced DIMMs in my server?

No, registered ECC modules cannot be mixed with unbuffered or load-reduced memory; all slots must use the same registered ECC type.

How can I verify the kit is running at the rated 5600 speed and CL46 latency after installation?

Check the memory speed and timings in your system BIOS or a utility such as CPU-Z; they should show 5600 MT/s and CAS latency 46.

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