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Four green DDR4 server memory sticks with gold contacts and black chips

OWC

OWC 64GB (4x16GB) DDR4 2400 CL17 2Rx4 ECC Registered RDIMM 1.2V 288-pin Server RAM

SKU CH-JPH3-74GFZ

Four 16 GB DDR4 ECC registered RDIMMs at 2400 MHz CL17 add 64 GB of error-correcting server memory

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR4 2400 (PC4 19200)
  • CAS latencyCL17
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 64GB (4 x 16GB)

Show 2 more

Rank 2Rx4

  • ECC registered design protects data integrity in servers
  • 64GB quad-channel kit expands memory capacity for heavy workloads
  • DDR4 2400 CL17 speed delivers responsive performance at 1.2V
  • 288-pin RDIMM form factor fits standard server DIMM slots
  • JEDEC compliant modules ensure broad workstation and NAS compatibility

Server-grade ECC RDIMM kit

This OWC kit provides 64 GB of DDR4 memory across four 16 GB registered DIMMs. It targets administrators upgrading workstations, servers or NAS appliances that require error-correcting, registered modules. Standard desktop boards cannot use this memory and it must not be mixed with unbuffered DIMMs.

DDR4 2400 registered limits

The modules run at 2400 MT/s with CL17 latency and 1.2 V under JEDEC PC4-19200 specifications. Registered signalling adds a clock cycle, so throughput is bounded by the 2400 standard and the dual-rank 2Rx4 organisation. Systems that demand higher frequencies or unbuffered operation will not benefit from this kit.

Plain 288-pin modules without spreaders

Each DIMM uses a bare green PCB with 288 gold contacts and no heat spreader, keeping height to the JEDEC minimum for dense server chassis. The registered buffer and ECC logic sit on the module, so the memory controller handles parity without extra cabling. Installers simply seat the sticks in matched channels per the platform manual.

How it compares

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

Price $436.99
Pricier than about 68% of the 6,523 comparable items (median $188.99).
Total capacity 64 GB (4 × 16 GB)
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $6.83 per GB
Cheaper than about 55% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number2R4D42R4064S
Total capacity64 GB (4 × 16 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

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Questions about this item

Should I pick this 64 GB kit or look for a different capacity?

This kit provides four 16 GB modules for a total of 64 GB; choose it when your server or workstation has four available RDIMM slots and the platform supports 2Rx4 registered ECC memory.

What does the DDR4 2400 CL17 rating mean once the modules are installed?

The memory operates at 2400 MT/s with a CAS latency of 17 cycles, giving the low-latency, error-correcting throughput that registered ECC workloads expect.

Is the 288-pin RDIMM interface compatible with my server board?

These are standard 288-pin DDR4 registered ECC DIMMs keyed for server and workstation sockets; they will not fit or function in unbuffered desktop boards.

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