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Green rectangular DDR5 memory module with gold contacts and black chips, no heat spreader

OWC

OWC 128GB DDR5 4800 CL40 4Rx4 288-pin 1.1V ECC RDIMM Gigabyte R183-Z92/93/94/95/96

SKU CH-APN1-NWK0M

A 128 GB DDR5 4800 ECC registered DIMM for Gigabyte R183-Z92, Z93, Z94, Z95 and Z96 servers

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latency40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank4Rx4

Capacity 128GB

  • 128 GB single-module capacity maximises server density
  • DDR5 4800 speed with CL40 latency delivers high throughput
  • ECC registered design protects data integrity in critical workloads
  • 1 V operation reduces power draw per module
  • Validated for Gigabyte R183-Z92 through R183-Z96 platforms

Compatible Server Memory Upgrade

This OWC module is a 128GB DDR5 4800 CL40 ECC registered RDIMM built for the Gigabyte R183-Z92, R183-Z93, R183-Z94, R183-Z95 and R183-Z96 platforms. It operates at 1.1V with a 4Rx4 rank configuration and uses a standard 288-pin form factor. The part number is 4R8D54R4128G and the product is new.

Workstation and Server Builders Only

The module suits administrators upgrading compatible Gigabyte servers, workstations, NAS appliances or network switches that require registered ECC memory. It will not work in standard desktop computers and must not be mixed with unbuffered or load-reduced DIMMs. Buyers needing non-ECC or consumer DDR5 should look elsewhere.

Sustained Load Behaviour

JEDEC-standard timings and registered buffering keep signal integrity stable during continuous server workloads such as virtualization, database serving or file storage. The 1.1V operating voltage limits thermal output inside densely populated DIMM slots. Error-correcting code detects and corrects single-bit errors without halting the system.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $3,583.99
Pricier than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
CAS latency 40
Higher than about 70% of the 483 comparable items (median 22).
Price per GB $28.00 per GB
Pricier than about 78% of the 20,941 comparable items (median $8.19 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 number4R8D54R4128G
Total capacity128 GB
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latency40
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsGigabyte R183-Z92
Gigabyte R183-Z93
Gigabyte R183-Z94
Gigabyte R183-Z95
Gigabyte R183-Z96

Other versions of this model

5 more in the same range

Questions about this item

Does the 4Rx4 rank configuration require a Gigabyte R183-Z92 through R183-Z96 motherboard that supports registered ECC DDR5?

Yes, this 128GB DDR5 4800 CL40 4Rx4 module is built for the Gigabyte R183-Z92, R183-Z93, R183-Z94, R183-Z95 and R183-Z96 platforms that accept registered ECC RDIMMs.

Can I keep my existing unbuffered DDR5 DIMMs and add this registered ECC module alongside them?

No, the manufacturer states this registered ECC memory cannot be mixed with unbuffered or load-reduced modules; all slots must use the same registered ECC type.

After installation, how do I confirm the module is running at DDR5 4800 with ECC active?

Check the BIOS memory information or OS hardware report; it should show 128GB at 4800 MT/s, CL40, 1.1V, with ECC registered status reported as enabled.

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