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Green rectangular DDR4 memory module with gold edge connectors and black chips on both sides, no heat spreader

OWC

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

SKU CH-TQQ0-MVFWN

A single 128GB DDR4 3200 ECC registered RDIMM for ASRock server motherboards including SPC621D8U-2T

  • Total capacity128 GB
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latency22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank8Rx4
  • 128 GB single-module capacity simplifies high-density server upgrades
  • ECC registered design detects and corrects data errors for workload reliability
  • JEDEC-standard DDR4 3200 CL22 at 1.2 V ensures broad platform compatibility
  • Backward compatible with 2133, 2400, 2666 and 2933 MHz speeds
  • Validated for ASRock SPC621D8U-2T and SP2C621D16 series motherboards

Server Memory Upgrade

This 128GB DDR4 ECC Registered RDIMM is built for ASRock server motherboards including the SPC621D8U-2T and SP2C621D16 series. It targets administrators expanding capacity in workstations, servers or NAS systems that require registered error-correcting memory. The single-module design simplifies slot population on compatible platforms.

Sustained Workload Behaviour

Operating at DDR4 3200 with CL22 latency and 1.2V, the module maintains JEDEC-standard timing during continuous operation. Registered buffering reduces electrical load on the memory controller, helping stability when all channels are populated. Backward compatibility with 2133, 2400, 2666 and 2933MHz buses allows deployment in mixed-speed configurations without manual down-clocking.

Build and Installation Notes

The 288-pin form factor fits standard DDR4 RDIMM slots on the listed ASRock boards. No heat spreader is fitted, so airflow across the PCB is unimpeded in dense server chassis. The module cannot be mixed with unbuffered or load-reduced DIMMs, and it will not function in standard desktop systems that lack registered memory support.

How it compares

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

Price $795.99
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 $6.22 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

Questions about this item

How much power does the 128GB DDR4 3200 CL22 8Rx4 module draw at its rated 1.2V during sustained server workloads?

The module operates at the standard DDR4 voltage of 1.2V. Power draw scales with the 128GB capacity and 8Rx4 organisation, so sustained server loads will consume more watts than lower-density DIMMs, but the voltage remains fixed at 1.2V.

Which motherboard features must my system already provide for this 288-pin ECC Registered RDIMM to function?

Your motherboard must support DDR4 ECC Registered memory in a 288-pin DIMM slot, accept 8Rx4 modules, and run at 1.2V. The listed ASRock SPC621D8U-2T and SP2C621D16 series boards meet these requirements.

Will this 3200MHz CL22 8Rx4 RDIMM run reliably alongside older 2666MHz or 2933MHz ECC Registered DIMMs I keep in the same server?

Yes. The module is backward compatible with 2133MHz, 2400MHz, 2666MHz and 2933MHz speeds. When mixed, all DIMMs will operate at the lowest common speed and the tightest shared timings.

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