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Green rectangular DDR4 RDIMM with black chips and gold contacts

OWC

OWC 128GB DDR4 2933 PC4-23400 CL21 8Rx4 288-pin 1.2V ECC Registered RDIMM for ASUS GPU Server ESC8000 G4

SKU CH-8ETK-1YQ7F

Single 128GB DDR4 2933 ECC registered RDIMM for ASUS ESC8000 G4 GPU servers

  • Total capacity128 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latency21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank8Rx4
  • 128 GB single module doubles server capacity
  • ECC registered design detects and corrects memory errors
  • 2933 MHz DDR4 speed with CL21 latency
  • 2 V operation reduces power draw and heat
  • Compatible with ASUS ESC8000 G4 and ASRock 621D series motherboards

Server-Specific 128GB ECC RDIMM

This 128GB DDR4 ECC Registered DIMM is built for the ASUS GPU Server ESC8000 G4 and compatible ASRock server motherboards. It targets administrators who need high-capacity, error-correcting memory for virtualization, GPU compute or database workloads. The module operates at 1.2V and conforms to JEDEC PC4-23400 standards. It will not work in standard desktop PCs or alongside unbuffered or load-reduced DIMMs.

Keyed 288-Pin Installation Constraints

The 288-pin RDIMM fits only server boards that support registered ECC memory and 8Rx4 rank configuration. Because it lacks a heat spreader, airflow across the module must be maintained by the chassis fans. Mixing this stick with unbuffered or ECC load-reduced memory will prevent the system from posting. Backward compatibility covers 2133, 2400 and 2666 speeds, but the platform must explicitly support registered DIMMs.

Steady-State ECC Throughput

Under sustained load the registered buffer and ECC logic maintain data integrity without the correctable-error spikes seen in unbuffered modules. The CL21 latency at 2933 MT/s delivers consistent bandwidth for multi-threaded server tasks rather than burst-oriented benchmarks. Continuous operation at 1.2V keeps thermal output predictable inside dense GPU server chassis. The module is validated for 24/7 duty cycles in qualified platforms.

How it compares

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

Price $742.99
Pricier than about 57% 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 21
Lower than about 63% of the 483 comparable items (median 22).
Price per GB $5.80 per GB
Cheaper than about 67% 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 number2R9D48R4128G
Total capacity128 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latency21
ECC supportYes
Buffer typeRegistered
Memory rank8Rx4
Heat spreaderNo
Power
Rated voltage1.2 V

Questions about this item

How can I verify the OWC 128GB DDR4 2933 module is running at PC4-23400 CL21 after installing it in my ASUS ESC8000 G4?

Check the BIOS or UEFI memory information screen; it should report DDR4 2933 speed, CAS latency 21 and 1.2V operation for the installed 128GB RDIMM.

What comes with the 2R9D48R4128G part and do I need any extra brackets or cables for the ESC8000 G4?

The package contains a single 128GB 288-pin ECC registered DIMM; no additional brackets, cables or heat spreaders are required for the ASUS GPU server.

Should I choose the 128GB 8Rx4 version or a different capacity for the ASRock EPC621D4I-2M motherboard?

This module is a single 128GB 8Rx4 RDIMM; select it when you need maximum density per slot on the EPC621D4I-2M or other listed server boards.

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