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Two green 288-pin DDR4 LRDIMM modules, no heat spreader

OWC

OWC 2L4D44R4128P 128GB (2x64GB) DDR4 2400 CL17 ECC LRDIMM memory upgrade

SKU CH-ERHM-6AZSZ

128GB DDR4 ECC Load-Reduced DIMM kit for Cisco HX220c M4 and HX240c M4 servers

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR4 2400 (PC4 19200)
  • CAS latencyCL17
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Memory rank4Rx4

Capacity 128GB (2 x 64GB)

  • ECC load-reduced design protects data integrity in servers
  • 128 GB kit (2×64 GB) expands Cisco HX220c M4 and HX240c M4 memory capacity
  • DDR4 2400 CL17 at 1.2 V balances speed and power efficiency
  • 288-pin 4Rx4 LRDIMM form factor fits validated server slots
  • Backward compatible with 2133 MHz systems for flexible deployment

Server ECC LRDIMM kit

This OWC kit supplies 128 GB of DDR4 ECC load-reduced memory as two 64 GB modules. The parts are built to PC4-19200 speed with CL17 timing and 1.2 V operation. They are validated for Cisco HX220c M4 and HX240c M4 servers.

Suits Cisco HX owners

IT teams expanding or repairing HX220c M4 or HX240c M4 nodes can install these modules directly. The kit will not work in standard desktops, unbuffered platforms or systems that require registered ECC instead of load-reduced DIMMs.

4Rx4 load-reduced organisation

Each 64 GB module uses a 4Rx4 configuration that reduces electrical load on the memory bus. This organisation is mandatory for the supported Cisco servers; mixing with other ranks or buffer types will prevent boot.

How it compares

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

Price $772.99
Pricier than about 57% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $6.04 per GB
Cheaper than about 65% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2L4D44R4128P
Total capacity128 GB (2 × 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 HX220c M4
Cisco HX240c M4

Other versions of this model

5 more in the same range

Questions about this item

Will the 4Rx4 ECC LRDIMM modules need replacement if I later add registered ECC DIMMs?

The load-reduced 4Rx4 design cannot be mixed with registered or unbuffered ECC memory, so any future capacity change requires matching LRDIMM modules.

What limits sustained throughput on the 2400 MHz CL17 kit?

The DDR4 2400 PC4-19200 rating and CL17 latency set the maximum bandwidth and response time under continuous load.

How much heat and power do the 1.2 V 64 GB LRDIMMs produce all day?

Each module runs at 1.2 V without a heat spreader; the load-reduced buffer reduces electrical load on the memory bus during extended operation.

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