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Eight green DDR4 LRDIMM sticks in a row

OWC

OWC 1TB 8x128GB DDR4 3200 CL22 4Rx4 288-pin 1.2V ECC LRDIMM Kit Cisco UCS C4200

SKU CH-ZWDS-84FVK

Eight 128 GB DDR4 3200 CL22 ECC load-reduced DIMMs totalling 1 TB for Cisco UCS C4200 servers

  • Total capacity1024 GB (8 × 128 GB)
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latencyCL22
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Memory rank4Rx4
  • 1 TB total capacity across eight 128 GB modules
  • DDR4 3200 speed with CL22 latency for server workloads
  • ECC load-reduced design corrects errors and lowers electrical load
  • 2 V operation reduces power draw in dense configurations
  • Backward compatible with 2133, 2400, 2666 and 2933 MHz systems

Server Memory Kit

This OWC kit delivers 1024GB of DDR4 ECC Load-Reduced memory across eight 128GB modules for the Cisco UCS C4200. It targets administrators who need maximum registered capacity in qualified server slots. The 4Rx4 organisation and 288-pin form factor match the platform’s memory architecture exactly. Desktop or unbuffered systems cannot use these modules.

Sustained Load Behaviour

Rated at 3200 MT/s with CL22 timing and 1.2V operation, the modules maintain JEDEC-standard throughput during continuous server workloads. Load-Reduced buffering reduces electrical load on the memory controller, helping stability when all channels are populated. Backward compatibility with 2133, 2400, 2666 and 2933 MT/s allows deployment in mixed-speed configurations without down-clocking surprises.

Build And Connectors

Each module uses a bare 288-pin PCB without a heat spreader, relying on chassis airflow for cooling in dense Cisco UCS C4200 enclosures. The ECC Load-Reduced design prevents mixing with standard registered or unbuffered DIMMs, so population rules must be followed. The kit replaces Cisco part numbers UCSML128G4RW and UCSXML128G4RW for direct field upgrades.

How it compares

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

Price $5,380.99
Pricier than about 81% of the 21,161 comparable items (median $397.99).
Total capacity 1024 GB (8 × 128 GB)
Higher than about 93% of the 20,941 comparable items (median 32 GB).
Price per GB $5.25 per GB
Cheaper than about 73% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number3L2D44R41TBK
Total capacity1024 GB (8 × 128 GB)
Product type288-Pin DDR4 ECC LRDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latencyCL22
ECC supportYes
Buffer typeLoad Reduced
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsCisco UCS C4200

Questions about this item

How much power does the 1.2V 1024GB kit draw when the Cisco UCS C4200 runs all day?

Each 128GB module operates at 1.2V, so the eight-module kit runs at standard DDR4 voltage without extra power overhead.

What must the Cisco UCS C4200 already have for this 288-pin LRDIMM kit to work?

The server must support DDR4 ECC load-reduced memory and accept 4Rx4 modules in its 288-pin DIMM slots.

Will these 3200MHz CL22 modules run with older 2133MHz or 2666MHz DIMMs still installed in the C4200?

The kit is backward compatible with 2133MHz, 2400MHz, 2666MHz and 2933MHz speeds, but cannot be mixed with unbuffered or registered ECC DIMMs.

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