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

OWC

OWC 128GB DDR4 3200 PC4-25600 CL22 8Rx4 288-pin 1.2V ECC Registered RDIMM Memory Upgrade

SKU CH-62SK-7D9GF

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

  • Total capacity128 GB
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latency22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank8Rx4
  • 128GB single module expands server capacity
  • DDR4 3200 speed handles demanding workloads
  • ECC registered design protects data integrity
  • JEDEC and ROHS compliant ensures compatibility
  • Validated for ASRock 4U server platforms

128 GB ECC Registered DDR4 Upgrade

This single 128 GB DDR4 3200 module is built for the ASRock Barebone Server 4U8G-ROME2/2T-24S and listed compatible systems. It is an ECC Registered RDIMM designed for workstation and server platforms, not for standard desktop computers. The 8Rx4 organisation and 1.2 V operation match JEDEC specifications for registered memory. Mixing with unbuffered or load-reduced DIMMs is not supported.

Thermals and Power in Normal Use

Operating at 1.2 V, the module draws minimal power for its capacity and runs without a heat spreader. Passive cooling relies on the server chassis airflow, so noise remains that of the system fans under typical workloads. The JEDEC-standard voltage helps keep thermal output predictable in densely populated slots.

Build Quality and Daily Implications

The 288-pin RDIMM fits the server's registered DIMM slots and the 8Rx4 rank layout suits high-capacity configurations. JEDEC and ROHS compliance indicates adherence to industry manufacturing standards. Because it is registered ECC memory, it cannot be used in consumer desktop boards or mixed with unbuffered or LRDIMM modules, limiting upgrades to compatible server platforms only.

How it compares

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

Price $794.99
Pricier than about 58% 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 $6.21 per GB
Cheaper than about 63% 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 Barebone Server 4U8G-ROME2/2T-24S
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

How do I install this 288-pin DDR4 ECC RDIMM into the ASRock Barebone Server 4U8G-ROME2/2T-24S, and what step is often missed?

Power down the server, open the chassis, align the module notch with the slot key, press firmly until the retention clips lock on both sides, then verify in BIOS that all 128GB registers at DDR4 3200 with ECC active — the step most often missed is confirming ECC operation in firmware after the physical install.

What maintenance or replacement will this 8Rx4 registered module need over its service life?

No scheduled maintenance is required for the module itself; keep the server air filters clean so the 1.2V DIMM stays within thermal limits, and replace only if a memory test reports uncorrectable ECC errors or the system logs recurring corrected-error thresholds.

What limit appears first when this CL22 128GB DIMM runs sustained workloads in the 4U8G-ROME2/2T-24S?

The memory controller’s maximum supported rank count per channel is reached before bandwidth or thermal limits, so population rules for 8Rx4 modules dictate how many DIMMs can be installed without down-clocking from DDR4 3200.

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