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Eight green DDR4 RDIMM modules with gold contacts and black chips

OWC

OWC 256GB (8x32GB) DDR4 2400MHz CL17 ECC Registered RDIMM 1.2V 288-pin Server RAM

SKU CH-KH2D-GRGC4

Eight-module kit delivers 256 GB of DDR4 2400 MHz ECC registered server memory at CL17 and 1.2 V

  • Total capacity256 GB (8 × 32 GB)
  • Rated speedDDR4 2400 (PC4 19200)
  • CAS latencyCL17
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 256GB (8 x 32GB)

Show 2 more

Rank 2Rx4

  • ECC registered design protects data integrity in servers
  • 256 GB total capacity across eight 32 GB modules
  • DDR4 2400 MHz CL17 speed meets PC4-19200 standard
  • 2 V operation reduces power draw in dense configurations
  • 288-pin RDIMM form factor fits server and workstation slots

Server Memory Kit for Workstations and NAS

This OWC kit provides 256GB of DDR4 memory across eight 32GB modules. It is built for servers, workstations and NAS systems that require registered ECC RDIMMs. Standard desktop computers cannot use this memory and it must not be mixed with unbuffered modules.

Registered ECC with 2Rx4 Organisation

The decisive specification is the registered ECC design with a 2Rx4 rank configuration. This architecture allows the memory controller to address higher capacities per channel while correcting single-bit errors. Systems that expect unbuffered non-ECC DIMMs will not post with these modules installed.

Sustained Operation at 1.2V JEDEC Standard

Each module runs at the JEDEC-standard 1.2V and 2400MHz CL17 without overclocking headroom. Under continuous load the registered buffer reduces electrical loading on the memory bus, helping maintain signal integrity across all eight DIMMs in multi-channel configurations.

How it compares

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

Price $1,512.99
Pricier than about 84% of the 6,523 comparable items (median $188.99).
Total capacity 256 GB (8 × 32 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $5.91 per GB
Cheaper than about 65% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number2R4D42R4256K
Total capacity256 GB (8 × 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 does the 256 GB capacity mean for a server workload?

The kit provides eight 32 GB registered ECC modules, giving a single system 256 GB of error-correcting memory for large datasets or virtualisation.

What does PC4-19200 indicate about the DDR4 2400 interface?

PC4-19200 is the JEDEC designation for DDR4 2400, confirming the modules run at 2400 MHz with CL17 latency at 1.2 V.

What physical slot and clearance do these 288-pin RDIMMs need?

Each module uses a standard 288-pin DDR4 RDIMM form factor with no heat spreader, so it fits any server or workstation board that accepts registered ECC DIMMs.

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