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Green circuit board with black memory chips and gold edge connector

OWC

OWC 4R8D54R4128G 128GB DDR5 4800 CL40 4Rx4 ECC RDIMM 1.1V memory upgrade

SKU CH-D0AM-RQ1SM

A 128 GB DDR5 4800 CL40 ECC registered RDIMM for Gigabyte R263-Z34, R263-Z35, R263-Z36, R263-Z37 and R283-Z90 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 maximises server capacity
  • DDR5 4800 CL40 delivers high-throughput data rates
  • ECC registered design protects data integrity
  • 1 V operation reduces power draw
  • Validated for Gigabyte R263-Z34 R263-Z35 R263-Z36 R263-Z37 R283-Z90

128GB DDR5 4800 ECC RDIMM

This is a single 128GB DDR5 4800 PC5-38400 CL40 4Rx4 288-pin 1.1V ECC Registered RDIMM module from OWC. It is built for workstations, servers, NAS systems and network switches that require registered ECC memory. The part number is 4R8D54R4128G.

For registered ECC platforms only

Suits administrators upgrading or repairing Gigabyte R263-Z34, R263-Z35, R263-Z36, R263-Z37 or R283-Z90 systems that accept 4Rx4 registered DIMMs. Not for standard desktop computers, laptops or consumer motherboards that use unbuffered non-ECC memory. Cannot be mixed with unbuffered or load-reduced ECC modules.

128GB single-module capacity

One module delivers 128GB at DDR5 4800 with CL40 latency and 1.1V operation. The 4Rx4 organisation and registered buffer determine electrical compatibility with the memory controller. Verify the platform supports this rank structure and maximum per-slot density before purchase.

How it compares

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

Price $3,556.99
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 $27.79 per GB
Pricier than about 78% of the 20,941 comparable items (median $8.19 per GB).

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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 R263-Z34
Gigabyte R263-Z35
Gigabyte R263-Z36
Gigabyte R263-Z37
Gigabyte R283-Z90

Other versions of this model

5 more in the same range

Questions about this item

Will the single 128GB 4Rx4 module need any firmware updates or matching kits later?

The module is JEDEC-standard and ROHS compliant, tested to meet OEM specs, so no firmware updates or matched kits are required for the listed Gigabyte platforms.

What electrical limit appears first when this 1.1V DDR5 4800 CL40 RDIMM runs sustained workloads?

The registered buffer and on-die ECC keep signal integrity within the 1.1V JEDEC envelope, so the voltage rail remains the primary ceiling under continuous load.

How much heat and noise does the bare 288-pin 128GB stick add to a server chassis running all day?

Without a heat spreader the module relies on chassis airflow; at 1.1V its thermal contribution is modest and it adds no audible noise.

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