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Eight green DDR4 RDIMM modules in a row

OWC

OWC 128GB (8x16GB) DDR4 3200 CL22 288-pin 1.2V ECC Registered RDIMM Cisco UCS C4200

SKU CH-E77W-KWJ7Y

Eight-module kit adds 128 GB of DDR4 3200 ECC registered memory to a Cisco UCS C4200 server

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latencyCL22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank1Rx4

Capacity 128GB (8 x 16GB)

Show 2 more
  • 128GB total capacity from eight 16GB modules
  • ECC registered design protects data integrity in servers
  • DDR4 3200 speed with CL22 latency
  • 2V operation reduces power draw
  • Validated for Cisco UCS C4200 systems

OWC 128GB DDR4 ECC RDIMM Kit

This 128GB kit contains eight 16GB DDR4 3200 registered DIMMs built for the Cisco UCS C4200 server platform. The modules are ECC registered, so they will not work in standard desktop computers or alongside unbuffered or load-reduced memory. Each stick runs at 1.2V with CL22 latency and a 1Rx4 organisation.

Thermals and power in normal use

Operating at the standard 1.2V DDR4 voltage, the modules draw minimal power and generate little heat during typical server workloads. No heat spreaders are fitted, relying on chassis airflow for cooling. The registered design adds a small electrical load per channel but keeps signal integrity stable under sustained use.

Build quality and daily implications

OWC tests every module in-house to meet JEDEC and RoHS specifications, and the kit replaces Cisco part numbers UCSMRX16G1RW and UCSXMRX16G1RW. The 288-pin RDIMM form factor fits only compatible server slots, so verify your C4200 memory configuration before installation. Matching capacity, speed and vendor across all slots is recommended for optimal performance.

How it compares

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

Price $887.99
Pricier than about 60% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (8 × 16 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $6.94 per GB
Cheaper than about 58% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number3R2D41R4128K
Total capacity128 GB (8 × 16 GB)
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latencyCL22
ECC supportYes
Buffer typeRegistered
Memory rank1Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsCisco UCS C4200

Other versions of this model

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Questions about this item

How do I install the 8x16GB DDR4 3200 RDIMM kit in the Cisco UCS C4200, and what step is often missed?

Power down the server, open the chassis, align each 288-pin module with the DIMM slots, press firmly until both latches click, then verify all 128GB appears in BIOS before closing the case.

What maintenance or replacement will this ECC Registered DDR4 kit need later?

No routine maintenance is required; if a module fails, replace it with an identical 16GB 1Rx4 CL22 1.2V DDR4 3200 RDIMM to keep rank and timing consistent across all slots.

What limit appears first under sustained load with this 128GB DDR4 3200 CL22 kit?

The CL22 latency at 3200 MT/s sets the throughput ceiling; sustained workloads will hit that timing boundary before voltage or thermal limits become a factor.

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