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Eight green DDR4 LRDIMM modules in anti-static bags

OWC

OWC 512GB (8x64GB) DDR4 2400 CL17 4Rx4 288-pin 1.2V ECC LRDIMM Kit for Cisco UCS C240 M4

SKU CH-CMMX-KHTC1

Eight 64 GB DDR4 2400 CL17 ECC load-reduced DIMMs totalling 512 GB for Cisco UCS C240 M4 servers

  • Total capacity512 GB (8 × 64 GB)
  • Rated speedDDR4 2400 (PC4 19200)
  • CAS latencyCL17
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Memory rank4Rx4

Capacity 512GB (8 x 64GB)

  • 512GB total capacity across eight 64GB modules
  • DDR4 2400 CL17 speed with 1.2V operation
  • ECC load-reduced 4Rx4 design for server reliability
  • 288-pin LRDIMM form factor fits Cisco UCS C240 M4
  • Backward compatible with 2133MHz systems for flexible deployment

Cisco UCS C240 M4 Memory Kit

This 512GB kit contains eight 64GB DDR4 2400 ECC Load Reduced DIMMs built for the Cisco UCS C240 M4 server. The 288-pin modules run at CL17 latency and 1.2V to match the platform's registered memory architecture.

ECC Load Reduced Architecture

Error-correcting code protects data integrity while the load-reduced design lowers electrical load on the memory bus, allowing all eight slots to be populated without signal degradation. This memory cannot be mixed with unbuffered or standard registered DIMMs.

512GB Capacity With 2133MHz Fallback

The full kit delivers 512GB for virtualisation density, in-memory databases or large-scale compute workloads. Modules automatically operate at 2133MHz if the system requires the lower speed, preserving compatibility across supported configurations.

How it compares

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

Price $2,866.99
Pricier than about 72% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (8 × 64 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $5.60 per GB
Cheaper than about 69% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2L4D44R4512K
Total capacity512 GB (8 × 64 GB)
Product type288-Pin DDR4 ECC LRDIMM
Performance
Rated speedDDR4 2400 (PC4 19200)
Memory
CAS latencyCL17
ECC supportYes
Buffer typeLoad Reduced
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsCisco UCS C240 M4

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Questions about this item

Will any of the 64GB LRDIMM modules need replacing during the server's normal service life?

The eight 64GB modules are solid-state with no moving parts; under normal server workloads they do not require scheduled replacement.

What limits sustained throughput when the Cisco UCS C240 M4 runs this 512GB kit at full load?

The CL17 latency and 2400 MT/s data rate set the bandwidth ceiling for continuous memory-intensive tasks.

How much heat does the kit produce when all eight modules run at 1.2 V all day?

Each module operates at 1.2 V without a heat spreader; total power draw stays within standard LRDIMM limits for the C240 M4 chassis cooling.

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