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Four green 288-pin DDR4 ECC registered DIMMs, no heat spreaders

OWC

OWC 256GB (4x64GB) DDR4 2933 CL21 4Rx4 ECC RDIMM PowerEdge C4140

SKU CH-P0AV-5P7M4

256 GB kit of four 64 GB DDR4 2933 CL21 ECC registered RDIMMs for PowerEdge C4140 servers

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank4Rx4

Capacity 256GB (4 x 64GB)

Show 4 more
  • ECC registered design protects data integrity in servers
  • 256GB kit (4 × 64GB) expands C4140 memory capacity
  • DDR4 2933 CL21 at 1.2V matches OEM specifications
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • Backward compatible with 2133, 2400 and 2666MHz systems

Server Memory Kit

This OWC kit provides 256GB of DDR4 ECC Registered memory in four 64GB modules built for the PowerEdge C4140 with SkyLake CPUs. It runs at 2933MHz with CL21 latency and 1.2V operation, delivering error-correcting, registered performance for server and workstation workloads.

Compatibility Scope

Suited for administrators upgrading a compatible PowerEdge C4140 or similar server platforms that require 288-pin DDR4 ECC RDIMMs. Not for desktop PCs, laptops, or consumer motherboards that only accept unbuffered non-ECC memory, nor for systems needing load-reduced DIMMs.

Capacity And Headroom

The 256GB total across four slots supports large virtualisation clusters, in-memory databases and heavy multi-threaded compute tasks. Headroom ends when the platform's maximum supported memory per socket or total slot count is reached, or when workloads demand speeds above 2933MHz.

How it compares

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

Price $1,624.99
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 $6.35 per GB
Cheaper than about 62% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R9D44R4256S
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsPowerEdge C4140 (SkyLake CPU)

Other versions of this model

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Questions about this item

Does the Dell PowerEdge C4140 need a specific BIOS version to recognise the 4Rx4 2933 modules?

The kit is validated for the PowerEdge C4140 with SkyLake CPUs and runs at 2933 MHz CL21 1.2 V without additional configuration.

Can I keep my existing 2666 MHz RDIMMs and add this 2933 MHz kit in the same server?

The modules are backward compatible with 2133 2400 and 2666 MHz speeds so they will downclock to match slower RDIMMs already installed.

How can I confirm the full 256 GB kit is detected and running at 2933 MHz after installation?

Check the BIOS memory information or OS tools such as dmidecode; they should show four 64 GB registered ECC DIMMs at 2933 MT/s.

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