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Green rectangular circuit board with black memory chips and gold edge connectors

OWC

OWC 16GB DDR4 2400MHz ECC Registered RDIMM 288-Pin 2Rx8 CL17 1.2V Server Memory

SKU CH-KM4K-B5ARK

16 GB DDR4 ECC registered RDIMM for servers and workstations, 2400 MHz CL17 at 1.2 V

  • Total capacity16 GB
  • Rated speedDDR4 2400 (PC4 19200)
  • CAS latencyCL17
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx8
  • ECC registered design protects data integrity in servers
  • 2400MHz DDR4 speed delivers responsive multitasking performance
  • 16GB capacity extends server memory for demanding workloads
  • 2V low voltage reduces power consumption and heat
  • 288-pin RDIMM form factor fits compatible server slots

16GB DDR4 ECC Registered RDIMM

This 16GB DDR4 module runs at 2400MHz with CL17 latency and 1.2V operation. It uses a 288-pin 2Rx8 registered design with ECC for data integrity. The module is built as a direct replacement for the Crucial CT16G4RFD824A part. It targets servers, workstations and NAS systems that require registered memory.

Registered ECC interface limits

The registered buffer adds one clock cycle of latency compared to unbuffered modules. ECC functionality requires a platform chipset and CPU that support error correction. Mixing this RDIMM with unbuffered DIMMs will prevent the system from posting. The 2400MHz speed caps throughput at the PC4-19200 bandwidth ceiling.

16GB capacity headroom

A single 16GB stick suits moderate virtualization workloads and file-serving duties. Larger database caches or heavy container densities will exhaust this capacity quickly. Populating all available slots with identical modules maximises channel bandwidth. Systems needing more than 16GB per slot must use higher-density registered DIMMs.

How it compares

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

Price $110.99
Cheaper than about 65% of the 6,523 comparable items (median $188.99).
Total capacity 16 GB
Lower than about 60% of the 6,064 comparable items (median 32 GB).
Price per GB $6.94 per GB
Typical for this category: the median of 6,064 items is $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 number2R4D42R816 GB
Total capacity16 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2400 (PC4 19200)
Memory
CAS latencyCL17
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V

Questions about this item

Should I choose the 16GB 2Rx8 module or a different capacity for my server?

This module is a single 16GB 2Rx8 RDIMM; add matching modules to reach your platform's supported total capacity and populate channels evenly for best throughput.

What does the 2400MHz CL17 rating deliver in a live workload?

The DDR4 2400 CL17 specification provides 19200 MB/s peak bandwidth with 17-cycle latency, giving predictable throughput for ECC registered server and workstation tasks.

Will the 288-pin DDR4 ECC registered interface work in my standard desktop motherboard?

No — the 288-pin DDR4 ECC registered RDIMM is keyed for server and workstation platforms only and will not function in consumer desktop boards that require unbuffered memory.

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