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Four green DDR4 ECC RDIMM modules with gold contacts

OWC

OWC 128GB (4x32GB) DDR4 2400 ECC RDIMM CL17 Cisco UCS B420 M4 C460 M4

SKU CH-T955-QSTC6

A 128GB kit of four 32GB DDR4 2400 ECC registered DIMMs for Cisco UCS B420 M4 and C460 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)

  • 128 GB kit expands server memory capacity
  • ECC registered design protects data integrity
  • DDR4 2400 CL17 delivers responsive throughput
  • 2 V operation reduces power draw
  • Validated for Cisco UCS B420 M4 and C460 M4

System-Specific DDR4 ECC RDIMM Kit

This 128GB kit contains four 32GB DDR4 2400 ECC registered DIMMs built for Cisco UCS B420 M4 and C460 M4 servers. It is intended for administrators upgrading or repairing those specific platforms. The modules will not work in standard desktop computers or consumer workstations.

DDR4 2400 Registered ECC Constraints

The memory operates at DDR4 2400 with CL17 latency and 1.2V. Registered ECC modules cannot be mixed with unbuffered or load-reduced DIMMs in the same system. Capacity and speed are fixed by the server's memory controller and the installed processor generation.

Tool-Less DIMM Installation

Each 288-pin module seats vertically in the server's DIMM slots; no tools are required beyond opening the chassis. The most common error is mixing registered ECC with other memory types, which prevents the system from posting. Verify the Cisco part numbers HXMR1X322RVA or UCSMR1X322RVA match the existing configuration before installing.

How it compares

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

Price $832.99
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 $6.51 per GB
Cheaper than about 60% 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 B420 M4
Cisco UCS C460 M4 (DDR4)

Other versions of this model

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Questions about this item

Should I buy the 128GB kit as four 32GB modules or look for a different capacity?

The kit is sold only as four 32GB modules totalling 128GB; no other capacities are offered for this part.

What does the 2400MHz rating deliver in a Cisco UCS B420 M4 or C460 M4?

In those servers the modules run at DDR4 2400 with CL17 latency and 1.2V, providing ECC registered bandwidth up to PC4-19200.

Will the 288-pin DDR4 ECC registered interface work in a standard desktop motherboard?

No; the 288-pin registered DIMMs require a server or workstation platform that supports ECC registered memory and cannot be used in desktop boards.

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