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Four green DDR4 ECC registered RDIMM modules in anti-static tray

OWC

OWC 128GB (4×32GB) DDR4 2933 ECC Registered RDIMM memory upgrade CascadeLake

SKU CH-PX0W-AEHRX

128 GB kit of four 32 GB DDR4 2933 ECC registered RDIMMs for PowerEdge C4140 CascadeLake servers

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 128GB (4 x 32GB)

Show 4 more
  • 128 GB kit adds high-density capacity with four 32 GB modules
  • DDR4 2933 MHz speed supports demanding server workloads
  • ECC registered design protects data integrity in critical applications
  • CL21 latency at 1.2 V balances responsiveness and power efficiency
  • Backward compatible with 2133, 2400 and 2666 MHz platforms

128GB DDR4 ECC RDIMM kit

This 128GB kit contains four 32GB DDR4 2933 registered ECC DIMMs built for the Dell PowerEdge C4140 with Cascade Lake processors. It targets server and workstation administrators who need to expand memory capacity in that specific platform. The modules are not compatible with standard desktop computers or unbuffered memory configurations.

Registered ECC 2Rx4 at 1.2V

The defining specification is the registered ECC 2Rx4 organisation running at 1.2V with CL21 latency. This combination determines whether the memory will function in the C4140; unbuffered or load-reduced DIMMs will not work alongside these modules. Backward compatibility with 2133, 2400 and 2666MHz operation is also supported.

Four-slot population for C4140

Populating all four slots with this kit fills a matched set for the validated server, freeing the installer from mixing disparate modules. The 288-pin DDR4 form factor fits the C4140 DIMM sockets directly, and the registered buffer reduces electrical load on the memory controller. No heat spreader is fitted, so airflow in the server chassis must be sufficient for bare modules.

How it compares

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

Price $822.99
Pricier than about 58% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $6.43 per GB
Cheaper than about 61% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R9D42R4128S
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsPowerEdge C4140 (CascadeLake CPU)

Other versions of this model

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Questions about this item

What does 2933 MT/s mean for my PowerEdge C4140?

The kit runs at 2933 MT/s on Cascade Lake CPUs and will down-clock automatically to 2666, 2400 or 2133 MT/s if the processor or BIOS requires a lower speed.

How does the PC4-23400 rating affect usable bandwidth?

PC4-23400 is the JEDEC peak transfer rate for DDR4-2933; actual throughput is limited by the memory controller and channel population in the C4140.

Will these 288-pin RDIMMs fit the C4140 DIMM slots?

Yes, each module is a standard 288-pin DDR4 ECC Registered DIMM designed for the PowerEdge C4140 memory slots.

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