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Green bare circuit board DDR5 RDIMM module with black memory chips and gold edge contacts

OWC

OWC 16GB DDR5 4800 CL40 1Rx4 288-pin 1.1V ECC Registered RDIMM server RAM

SKU CH-ENF0-RD99P

A 16 GB DDR5 4800 CL40 ECC registered RDIMM for compatible workstations and servers

  • Capacity16GB
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 16GB

  • 16 GB DDR5 4800 for high-throughput server workloads
  • CL40 latency at 1.1 V keeps power draw low
  • ECC registered design protects data integrity in critical tasks
  • Single-rank 1Rx4 layout simplifies population rules
  • JEDEC and RoHS compliant for warranty-safe upgrades

Server DDR5 RDIMM for workstations

This 16 GB DDR5 4800 module is a JEDEC-standard registered ECC DIMM built for select servers and workstations. It runs at 1.1 V with CL40 latency and a 1Rx4 organisation across 288 pins.

Suits ECC registered platforms only

It fits systems that require registered ECC DDR5 and cannot be used in standard desktops or mixed with unbuffered or load-reduced modules. Buyers needing non-ECC consumer memory should look elsewhere.

16 GB single-module capacity

One DIMM adds 16 GB of registered ECC memory for multi-tasking and larger datasets in compatible servers. Capacity scales by populating additional slots with identical modules; a single stick cannot exceed 16 GB.

Highlights

  • 16 GB DDR5 4800 for high-throughput server workloads
  • CL40 latency at 1.1 V keeps power draw low
  • ECC registered design protects data integrity in critical tasks
  • Single-rank 1Rx4 layout simplifies population rules
  • JEDEC and RoHS compliant for warranty-safe upgrades

Specifications

BrandOWC
Part Number4R8D51R416GB
Capacity16GB
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx4
Heat SpreaderNo

Other versions of this model

2 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

What type of server or workstation motherboard slot does this 16GB DDR5 4800 CL40 RDIMM require?

The module installs in a 288-pin DDR5 RDIMM slot on a motherboard that supports ECC registered memory at 1.1V.

Can I mix this 1Rx4 ECC registered module with unbuffered or load-reduced DIMMs already in my system?

No. The manufacturer states it cannot be mixed with unbuffered or ECC load-reduced memory; all DIMMs should match in type, capacity and speed.

How can I verify the module is running at its rated DDR5 4800 speed and CL40 latency after installation?

Check the BIOS memory information or a system utility such as CPU-Z to confirm the operating frequency shows 4800 MT/s and timings match CL40.

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