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Two green DDR4 RDIMM modules with gold contacts, no heat spreaders

OWC

OWC 64GB (2x32GB) DDR4 2400 CL17 ECC Registered RDIMM Cisco UCS C240 M4 memory upgrade

SKU CH-97TN-E8KMR

Adds 64 GB of DDR4 2400 ECC registered memory to Cisco UCS C240 M4 servers in a two-module kit

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR4 2400 (PC4 19200)
  • CAS latencyCL17
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 64GB (2 x 32GB)

  • ECC registered design protects data integrity in servers
  • 64 GB kit with two 32 GB modules expands capacity
  • DDR4 2400 speed at CL17 latency supports demanding workloads
  • 2 V operation reduces power draw and heat
  • Validated for Cisco UCS C240 M4 for guaranteed compatibility

Server Memory Kit

This OWC upgrade kit supplies 64GB of DDR4 ECC Registered memory in two 32GB modules. It is built for the Cisco UCS C240 M4 server and operates at 2400MHz with CL17 latency and 1.2V power draw.

Registered ECC Design

The modules use a 2Rx4 registered architecture with on-board error correction. This configuration prevents data corruption in multi-socket workloads but cannot be mixed with unbuffered or load-reduced DIMMs in the same system.

Compatibility Check

Verify that your Cisco UCS C240 M4 currently supports registered ECC RDIMMs and has two free 288-pin slots. This kit will not work in standard desktop motherboards or in systems that require unbuffered or load-reduced memory.

How it compares

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

Price $395.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB (2 × 32 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $6.19 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 number2R4D42R4064P
Total capacity64 GB (2 × 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 C240 M4

Other versions of this model

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Questions about this item

Will the registered ECC DIMMs need any firmware or heat-spreader maintenance later?

No firmware updates are required; the modules have no heat spreader and run at the standard 1.2 V, so they need no special maintenance beyond normal server cleaning.

What limits sustained throughput on the Cisco UCS C240 M4 with these 2400 MHz CL17 modules?

The memory controller caps bandwidth at the rated 2400 MT/s PC4-19200 speed; latency is fixed at CL17, so sustained loads cannot exceed that ceiling.

How much heat and power do the two 32 GB 2Rx4 sticks add when the server runs all day?

Each 1.2 V DDR4 RDIMM draws only a few watts under load, producing minimal extra heat that the C240 M4's standard airflow handles without additional cooling.

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