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Green rectangular circuit board with gold edge connectors and black memory chips, no heat spreader

OWC

OWC 16GB DDR4 2400MHz ECC Registered RDIMM 2Rx8 CL17 1.2V server RAM

SKU CH-ST3J-CJVYJ

16GB DDR4 2400MHz ECC registered RDIMM for servers, workstations and NAS systems

  • Total capacity16 GB
  • Rated speedDDR4 2400 (PC4 19200)
  • CAS latencyCL17
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx8
  • ECC protection prevents data corruption in servers
  • Registered design stabilises heavy multi-module loads
  • 2400 MHz DDR4 speed matches OEM Samsung specs
  • 16 GB capacity extends server memory affordably
  • 2 V operation reduces power draw per module

Server Memory Upgrade

This 16GB DDR4 ECC Registered RDIMM is designed for servers, workstations and NAS systems that require registered memory with error correction. It operates at 2400MHz with CL17 latency and 1.2V voltage, matching Samsung M393A2K43BB1-CRC and M393A2K43CB1-CRC specifications. The module uses a 2Rx8 rank configuration on a 288-pin form factor without a heat spreader.

Registered DDR4 Constraints

Registered ECC memory cannot be mixed with unbuffered modules and will not function in standard desktop computers that lack registered memory support. The DDR4 2400MHz PC4-19200 interface limits bandwidth to the JEDEC standard specification, and the CL17 timing is fixed for this module. Systems must support 288-pin Registered DIMMs at 1.2V for compatibility.

Capacity And Headroom

A single 16GB module provides substantial memory for virtualisation, database workloads and multi-user applications in compatible server platforms. The 2Rx8 organisation allows higher density per channel, but total capacity is constrained by the number of available memory slots and the server's maximum supported memory per channel. Workloads exceeding available slot capacity will require additional modules or higher-density alternatives.

How it compares

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

Price $107.99
Cheaper than about 66% 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 $6.75 per GB
Cheaper than about 56% of the 6,064 comparable items (median $7.25 per GB).

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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 look for a different capacity?

This module provides 16GB in a single 2Rx8 Registered DIMM. Add one per available slot to reach the total memory your server or workstation requires.

What does the DDR4 2400MHz CL17 rating deliver in a server?

It runs at 2400MHz with CAS latency 17 at 1.2V, giving JEDEC-standard throughput for DDR4 2400 Registered ECC memory in compatible systems.

How does the 288-pin Registered ECC interface affect compatibility?

The 288-pin RDIMM with ECC and register works only in server, workstation or NAS platforms that support Registered DDR4; it will not fit or function in standard desktop boards.

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