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Green printed circuit board with black memory chips on both sides, 288 gold edge contacts, no heat spreader

OWC

OWC 128GB DDR4 2400 CL17 8Rx4 288-pin 1.2V ECC Load Reduced DIMM memory upgrade

SKU CH-PHP3-A8Y5D

A 128GB DDR4 ECC load-reduced DIMM running at 2400MHz CL17 for compatible Fujitsu PRIMERGY servers and workstations

  • Total capacity128 GB
  • Rated speedDDR4 2400 (PC4 19200)
  • CAS latencyCL17
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Memory rank8Rx4
  • Massive 128GB capacity in a single module for dense server memory configurations
  • DDR4 2400 speed with CL17 latency delivers reliable throughput for enterprise workloads
  • ECC load-reduced design reduces electrical load on the memory bus for stable multi-DIMM operation
  • 2V operation lowers power draw compared to higher-voltage server memory alternatives
  • Validated replacement for Fujitsu part numbers S26361-F3935-L517, S26361F3935L617, S26361-F3935-E617 and S26361-F3935-E517

Server-grade ECC LRDIMM upgrade

This 128GB DDR4 load-reduced DIMM targets Fujitsu PRIMERGY TX2560 M2, BX2580 M2, RX2530 M2, RX2540 M2 and RX2560 M2 servers. It replaces Fujitsu part numbers S26361-F3935-L517, S26361F3935L617, S26361-F3935-E617 and S26361-F3935-E517. The module is not compatible with standard desktop computers and cannot be mixed with unbuffered or registered ECC memory.

Thermals and power profile

Operating at 1.2V, the DDR4 2400 CL17 module runs within JEDEC specifications for server platforms. No heat spreader is fitted, relying on chassis airflow for cooling. The load-reduced architecture reduces electrical load on the memory bus, helping maintain stable operation in fully populated configurations. Backward compatibility with 2133MHz systems allows deployment in mixed-speed environments.

Single-module capacity gain

The package contains one 128GB 288-pin ECC LRDIMM, delivering the full capacity increase in a single slot. This simplifies upgrades where slot count is limited and avoids the complexity of matching multiple smaller modules. OWC tests every module in-house and backs it with a limited lifetime warranty and free technical support.

How it compares

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

Price $710.99
Pricier than about 56% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $5.55 per GB
Cheaper than about 70% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number2L4D48R4128G
Total capacity128 GB
Product type288-Pin DDR4 ECC LRDIMM
Performance
Rated speedDDR4 2400 (PC4 19200)
Memory
CAS latencyCL17
ECC supportYes
Buffer typeLoad Reduced
Memory rank8Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsFujitsu PRIMERGY TX2560 M2
Fujitsu PRIMERGY BX2580 M2
Fujitsu PRIMERGY RX2530 M2
Fujitsu PRIMERGY RX2540 M2
Fujitsu PRIMERGY RX2560 M2

Questions about this item

How do I install the 128GB 8Rx4 LRDIMM in my Fujitsu PRIMERGY RX2560 M2, and what is the common mistake?

Power down, open the chassis, align the 288-pin key with the slot, press firmly until both latches click. The frequent error is mixing this Load Reduced module with Registered or Unbuffered DIMMs, which prevents boot.

What maintenance or replacement will the 128GB DDR4 2400 CL17 module need over its service life?

No scheduled maintenance is required; the module has no heat spreader or moving parts. Replacement is only necessary if a memory test reports correctable ECC errors that exceed the platform threshold.

Which limit appears first when the 1.2V LRDIMM runs sustained workloads on a PRIMERGY TX2560 M2?

The memory controller’s maximum supported capacity per channel is reached before thermal or voltage limits, so population rules dictate how many 128GB modules can be installed.

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