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Four green DDR4 RDIMM modules with gold contacts and black chips

OWC

OWC 128GB (4x32GB) DDR4 2400 CL17 ECC Registered RDIMM Memory Upgrade Kit

SKU CH-C2DB-4AGYN

128 GB kit of four 32 GB DDR4 2400 CL17 ECC registered RDIMMs for Cisco UCS B200 M4 and C220 M4 servers

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR4 2400 (PC4 19200)
  • CAS latencyCL17
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 128GB (4 x 32GB)

  • ECC registered design protects data integrity in server workloads
  • 128 GB kit with four 32 GB modules expands memory capacity
  • DDR4 2400 CL17 speed matches Cisco UCS B200 M4 and C220 M4 specifications
  • 2 V low-voltage operation reduces power draw in dense configurations
  • 288-pin RDIMM form factor ensures correct fit in compatible Cisco UCS servers

128GB DDR4 ECC RDIMM Kit for Cisco UCS

This 128GB kit contains four 32GB DDR4 2400 CL17 registered ECC modules built to PC4-19200 specification. Each 288-pin DIMM operates at 1.2V with a 2Rx4 rank configuration and no heat spreader. The modules are validated for Cisco UCS B200 M4 and C220 M4 servers.

Who This Suits and Who It Does Not

IT teams upgrading or repairing Cisco UCS B200 M4 or C220 M4 platforms will find direct compatibility with listed part numbers. Buyers needing unbuffered memory, load-reduced DIMMs, or modules for standard desktop boards should look elsewhere. Mixing this registered ECC kit with other memory types is not supported.

Deciding Specification: Registered ECC DDR4

The defining attribute is the registered ECC DDR4 2400 CL17 2Rx4 288-pin form factor at 1.2V. Only systems that explicitly require this exact combination of registration, error correction, speed, rank, voltage and pin count will accept the kit. Verify the platform memory list before ordering.

How it compares

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

Price $821.99
Pricier than about 58% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $6.42 per GB
Cheaper than about 61% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R4D42R4128S
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2400 (PC4 19200)
Memory
CAS latencyCL17
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsCisco UCS B200 M4
Cisco UCS C220 M4

Other versions of this model

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Questions about this item

How do I install the 288-pin ECC Registered DIMMs in a Cisco UCS B200 M4 without mixing them with unbuffered memory?

Power down the server, open the chassis, locate the DIMM slots for each CPU, and insert each 32 GB module until the ejector clips lock. Do not mix these registered DIMMs with unbuffered or load-reduced memory.

What maintenance or replacement will the 128 GB DDR4 kit need over its service life?

The modules have no heat spreaders and no moving parts, so no routine maintenance is required. If a DIMM fails, replace the faulty 32 GB stick under the manufacturer's limited lifetime warranty.

What limit appears first when the 2400 MHz CL17 registered memory runs sustained workloads on a Cisco UCS C220 M4?

The memory controller caps throughput at DDR4-2400, so bandwidth saturates before thermal or voltage limits are reached.

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