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Four green circuit boards with black memory chips and gold edge connectors

OWC

OWC 128GB (4x32GB) DDR4 2400MHz CL17 ECC Registered RDIMM 1.2V 288-pin Server RAM

SKU CH-4PKZ-AT31K

128 GB DDR4 ECC registered server memory kit with four 32 GB modules at 2400 MHz CL17

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR4 2400 (PC4 19200)
  • CAS latencyCL17
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 128GB (4 x 32GB)

Show 2 more

Rank 2Rx4

  • ECC registered design protects data integrity in servers
  • 128 GB kit (4 × 32 GB) maximises memory capacity
  • DDR4 2400 MHz CL17 meets JEDEC PC4-19200 standard
  • Low 1.2 V operation reduces power draw
  • 288-pin RDIMM form factor fits server and workstation slots

OWC 128GB DDR4 ECC Registered Kit

This OWC kit provides 128GB of DDR4 server memory across four 32GB registered DIMMs. Each module runs at 2400MHz with CL17 latency and 1.2V operation. The 2Rx4 ECC registered design targets workstation and server platforms that require error-correcting, buffered memory.

Suited for servers needing matched ECC RDIMMs

The four-module configuration suits administrators upgrading compatible servers, workstations or NAS systems with a validated 128GB set. Builders of standard desktop PCs or consumer laptops cannot use registered ECC memory and should choose unbuffered non-ECC modules instead.

Registered ECC DDR4 at 2400MHz CL17

The registered ECC DDR4 specification at 2400MHz CL17 is the single factor that decides fit. Only systems explicitly supporting DDR4 registered ECC RDIMMs at this speed and latency will accept the kit.

How it compares

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

Price $859.99
Pricier than about 79% 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 $6.72 per GB
Cheaper than about 56% of the 6,064 comparable items (median $7.25 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number2R4D42R4128S
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2400 (PC4 19200)
Memory
CAS latencyCL17
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

5 more in the same range

Questions about this item

What comes in the box and is any extra hardware required?

The kit contains four 32 GB DDR4 2400 MHz CL17 ECC registered RDIMM modules for a total of 128 GB. No additional hardware is needed; install the modules directly into compatible 288-pin server or workstation slots.

How do I decide between the available capacities or speeds?

This specific kit is a single 128 GB (4 × 32 GB) configuration running at DDR4 2400 (PC4-19200) with CL17 latency. Choose it when your platform requires registered ECC memory at this speed and density.

What does the 2400 MHz rating mean once the memory is installed?

The modules operate at 2400 MT/s (PC4-19200) with CL17 timing at 1.2 V. Actual throughput depends on the server or workstation memory controller and the number of populated channels.

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