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Four green 288-pin DDR4 LRDIMM modules, bare chips, no heat spreaders

OWC

OWC 256GB (4x64GB) DDR4 2400 CL17 ECC LRDIMM 288-pin 1.2V memory upgrade

SKU CH-KM6K-E5Q54

256 GB kit of four 64 GB DDR4 2400 CL17 ECC load-reduced DIMMs for Cisco HX220c M4 and HX240c M4 servers

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR4 2400 (PC4 19200)
  • CAS latencyCL17
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Memory rank4Rx4

Capacity 256GB (4 x 64GB)

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

Server memory upgrade kit

This 256GB kit contains four 64GB DDR4 2400 CL17 ECC load-reduced DIMMs built for Cisco HX220c M4 and HX240c M4 servers. It is intended for administrators who need to expand memory capacity in those specific platforms.

Load-reduced ECC DDR4 2400 CL17

The modules are 288-pin LRDIMMs operating at 1.2V with a 4Rx4 organisation and PC4-19200 speed rating. This exact memory type is required; standard unbuffered or registered ECC DIMMs will not work in these systems.

Four matched modules replace Cisco UCSML1X644RVA

The kit supplies a complete population of four identical sticks so the server can run in its optimal channel configuration. No additional accessories or software are included in the package.

How it compares

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

Price $1,562.99
Pricier than about 65% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $6.11 per GB
Cheaper than about 64% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2L4D44R4256S
Total capacity256 GB (4 × 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

What does the 256GB total capacity actually give me in a Cisco HX220c M4?

The kit supplies four 64GB LRDIMMs for 256GB of ECC load-reduced memory, letting the server address larger datasets and run more virtual machines without swapping.

What does PC4-19200 CL17 tell me about real-world throughput and latency?

PC4-19200 rates the modules at 2400 MT/s with a CAS latency of 17 cycles; the memory controller will also run them at 2133 MT/s if the platform requires it.

Will these 288-pin LRDIMMs physically seat in the HX240c M4 DIMM slots?

Yes, each module is a standard 288-pin DDR4 LRDIMM with no heat spreader, matching the form factor used by the Cisco HX220c M4 and HX240c M4.

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