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OWC

OWC 128GB DDR4 3200 ECC RDIMM 3R2D48R4128G memory upgrade

SKU CH-X1XT-E9ETP

A single 128GB DDR4 3200 ECC registered RDIMM for compatible ASRock Open 19 servers

  • Total capacity128 GB
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latency22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank8Rx4
  • 128 GB single-module capacity for dense server configurations
  • DDR4 3200 speed with CL22 latency for responsive workloads
  • ECC registered design detects and corrects data errors
  • 2 V operation reduces power draw in rack environments
  • Validated for ASRock Open 19 1U and 2U platforms

OWC 128GB DDR4 3200 ECC RDIMM

This 128GB DDR4 3200 ECC Registered DIMM is built for ASRock Open 19 server and workstation platforms including the 1U-Open19-c3.Medium.x86, 1U-Open19-m3.Large.x86 and 2U-Open19-m3.XLarge.x86 models. It suits administrators expanding memory capacity in compatible 1U or 2U systems. Desktop PCs and consumer motherboards cannot use this module.

128GB single module capacity and speed headroom

The module delivers 128GB in a single 288-pin RDIMM operating at 3200MHz CL22 (PC4-25600) and 1.2V. It is backward compatible with 2133MHz, 2400MHz, 2666MHz and 2933MHz bus speeds, automatically clocking down when the platform requires it. The 8Rx4 organisation provides high density but prevents mixing with unbuffered or load-reduced ECC memory.

Registered ECC build with JEDEC compliance

The stick uses a registered ECC design without a heat spreader, relying on server chassis airflow for cooling. JEDEC-standard and RoHS-compliant construction ensures a warranty-safe upgrade that meets OEM specifications. The 288-pin RDIMM keying fits only registered ECC slots, so it will not seat in standard unbuffered DIMM sockets.

How it compares

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

Price $745.99
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 22
Typical for this category: the median of 483 items is 22.
Price per GB $5.83 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 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

Questions about this item

Will the 128GB DDR4 3200 ECC RDIMM run reliably alongside my existing 2133MHz or 2666MHz DDR4 modules?

Yes, the module is backward compatible with 2133MHz, 2400MHz, 2666MHz and 2933MHz DDR4 speeds. When mixed, all modules operate at the speed of the slowest installed DIMM.

How can I verify the 128GB 8Rx4 registered ECC module is functioning correctly after installation?

Check the system BIOS or UEFI to confirm 128GB is detected at 3200MHz with ECC active. Run a memory diagnostic such as MemTest86 to validate error-correction operation.

Does the 3R2D48R4128G package include a single 128GB 288-pin RDIMM only, or are extra items supplied?

The upgrade consists of one 128GB DDR4 3200 PC4-25600 CL22 8Rx4 288-pin 1.2V ECC Registered RDIMM. No cables, brackets or additional accessories are included.

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