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Green rectangular DDR4 memory module with gold edge connectors and black chips on both sides

OWC

OWC 128GB DDR4 3200 ECC Registered RDIMM 288-pin CL22 1.2V 8Rx4 memory upgrade

SKU CH-80X4-F1DEE

A 128GB DDR4 3200 ECC registered RDIMM for compatible ASRock servers and workstations

  • Total capacity128 GB
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latency22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank8Rx4
  • High-density 128 GB single module for maximum server capacity
  • ECC registered design detects and corrects data errors in critical workloads
  • DDR4 3200 CL22 at 1.2 V balances speed and efficiency
  • 288-pin RDIMM fits ASRock OCP and barebone server platforms
  • JEDEC and RoHS compliant for warranty-safe upgrades

Server memory upgrade

This single 128GB DDR4 3200 module is an ECC registered RDIMM built for ASRock OCP and bare-bone server platforms. It targets administrators who need to expand memory capacity in compatible workstations or NAS systems. The 288-pin form factor fits registered DIMM slots only.

Compatibility check

Verify that your motherboard accepts ECC registered DDR4 and does not require unbuffered or load-reduced modules. The listed ASRock OCP 1OU3N-MILAN/ORV3 and 4U server barebones are confirmed platforms; other boards must explicitly support registered ECC memory. Mixing with unbuffered or LR-DIMM modules will prevent operation.

Build and connectors

The module operates at 1.2V with CL22 latency and an 8Rx4 organisation. No heat spreader is fitted, so airflow across the DIMM rows must be maintained by the chassis. JEDEC and RoHS compliance ensures a warranty-safe upgrade. Backward compatibility with 2133, 2400, 2666 and 2933 speeds allows deployment in mixed-speed configurations.

How it compares

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

Price $740.99
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 $5.79 per GB
Cheaper than about 67% 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 systemsASRock OCP 1OU3N-MILAN/ORV3
ASRock Barebone Server 4U8G-ROME2/2T-24S EOB
ASRock Barebone Server 4U36L6E-ICX2/2T
ASRock Barebone Server 4U36L6E-MILAN2/2T
ASRock Barebone Server 4U4G-SPC621D8

Questions about this item

Does the 128GB DDR4 3200 RDIMM ship as a single stick or a kit, and are any brackets or cables required for installation?

The upgrade consists of one 128GB 288-pin DDR4 3200 ECC Registered RDIMM. No brackets, cables or additional parts are needed; it installs directly into a compatible DIMM slot.

How do I decide between this 128GB 8Rx4 module and a lower-capacity alternative for my ASRock OCP 1OU3N-MILAN/ORV3?

Choose the 128GB 8Rx4 module when you need maximum capacity per slot on supported ASRock OCP and 4U barebone servers; smaller capacities use fewer ranks and suit lighter workloads.

What does the 3200 PC4-25600 rating mean once the module is running in a server that only supports 2666 MT/s?

The module will down-clock to 2666 MT/s (or 2133, 2400, 2933 MT/s) while keeping CL22 timing and 1.2V operation, delivering full ECC Registered stability at the platform's top speed.

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