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

OWC

OWC 3R2D48R4128G 128GB DDR4 3200 CL22 8Rx4 ECC Registered RDIMM

SKU CH-273M-QFQ63

Single 128GB DDR4 3200 CL22 8Rx4 ECC Registered RDIMM for ASUS RS500A rack servers

  • Total capacity128 GB
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latency22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank8Rx4
  • 128GB single-module capacity simplifies server upgrades
  • DDR4 3200 speed with CL22 latency supports responsive workloads
  • ECC registered design protects data integrity in critical systems
  • 2V operation reduces power draw per module
  • Validated for ASUS RS500A rack server series

Server ECC Upgrade

This 128GB DDR4 ECC registered DIMM targets administrators who run ASUS rack servers and need maximum capacity per slot. It is built for 24/7 workloads where data integrity matters more than low latency. Desktop builders cannot use this module because the registered design and ECC function require server-class memory controllers.

128GB 8Rx4 Density

The single stick delivers 128GB at DDR4 3200 with CL22 timing and 1.2V operation. The 8Rx4 organisation is the specification that decides compatibility; systems that only accept lower-rank modules will not recognise it. Mixing with unbuffered or load-reduced DIMMs is not supported.

Sustained Load Behaviour

Under continuous throughput the module maintains its rated 3200 MT/s speed without throttling, and the ECC circuitry corrects single-bit errors in real time. Backward compatibility with 2133, 2400, 2666 and 2933 MT/s buses lets the same DIMM settle into older platforms while keeping full error detection.

How it compares

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

Price $727.99
Pricier than about 56% 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 22
Typical for this category: the median of 483 items is 22.
Price per GB $5.69 per GB
Cheaper than about 68% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number3R2D48R4128G
Total capacity128 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latency22
ECC supportYes
Buffer typeRegistered
Memory rank8Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsASUS Rack Server RS500A-E11-RS12U
ASUS Rack Server RS500A-E11-RS4U
ASUS Rack Server RS500A-E9-PS4
ASUS Rack Server RS500A-E9-PS4
ASUS Rack Server RS500A-E9-RS4

Questions about this item

What does the 128GB capacity mean for an ASUS RS500A-E11-RS12U server?

It adds 128GB of DDR4 3200 memory in a single registered DIMM, expanding the server's total RAM for larger workloads and virtualization.

How does the PC4-25600 rating limit real-world speed in this server?

The module runs at DDR4 3200 CL22; the server's memory controller will set the final speed, which can fall back to 2933, 2666, 2400 or 2133 MHz.

Will the 288-pin registered DIMM fit the RS500A-E9-PS4 memory slots?

Yes, it uses the standard 288-pin DDR4 RDIMM form factor required by the listed ASUS rack servers.

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