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Four green DDR5 RDIMM modules, 288-pin, no heat spreader

OWC

OWC 256GB (4x64GB) DDR5 4800 CL40 ECC Registered RDIMM memory upgrade

SKU CH-BC3D-AEYZY

256GB DDR5 4800 ECC Registered RDIMM kit (4×64GB, CL40, 1.1V) for Cisco UCS C220 M7 SFF, C240 M7 SFF, X210c M7 and X410c M7 servers

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 256GB (4 x 64GB)

  • 256GB total capacity across four 64GB modules
  • DDR5 4800 speed with CL40 latency at 1.1V
  • ECC registered design protects data integrity in servers
  • 2Rx4 dual-rank organisation for higher density per slot
  • Validated for Cisco UCS C220 M7 SFF, C240 M7 SFF, X210c M7 and X410c M7

Server ECC RDIMM kit

This OWC kit supplies 256 GB of DDR5 ECC Registered memory as four 64 GB modules. It is built for Cisco UCS C220 M7 SFF, C240 M7 SFF, X210c M7 and X410c M7 servers that require registered DIMMs with error correction. Workstations or desktops that accept only unbuffered or load-reduced modules cannot use this kit.

Installation notes

Each module is a standard 288-pin DDR5 RDIMM that seats in the server DIMM slots without tools. The registered buffer adds a clock cycle, so the system BIOS must support registered ECC memory; mixing with unbuffered or load-reduced DIMMs will prevent boot. No heat spreader is fitted, so airflow across the modules must be maintained by the server chassis fans.

DDR5 4800 interface limits

The modules run at DDR5 4800 (PC5-38400) with CL40 latency at 1.1 V, matching the JEDEC base specification for this speed grade. Bandwidth and latency are fixed by that standard; higher data rates or tighter timings are not supported by these parts. Capacity scaling beyond the four modules provided depends on the memory controller and slot count of the specific Cisco UCS model.

How it compares

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

Price $5,625.99
Pricier than about 81% 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 $21.98 per GB
Pricier than about 67% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D52R4256S
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsCisco UCS C220 M7 SFF
Cisco UCS C240 M7 SFF
Cisco UCS X210c M7
Cisco UCS X410c M7

Other versions of this model

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Questions about this item

How can I verify the 256GB DDR5 4800 CL40 kit is running correctly after installing it in my Cisco UCS C220 M7 SFF?

Enter the server BIOS or Cisco IMC and confirm all four 64GB modules are detected at 4800 MT/s with CL40 timings and ECC registered status.

What comes in the box and what must I purchase separately for this OWC 256GB DDR5 ECC RDIMM upgrade?

The kit includes four 64GB 288-pin DDR5 4800 CL40 2Rx4 1.1V ECC registered RDIMM modules; no additional parts are required for installation in compatible Cisco UCS servers.

Which capacity version of this OWC DDR5 4800 CL40 ECC registered RDIMM should I choose for my Cisco UCS X410c M7?

This kit provides 256GB total (4 × 64GB) and is the only capacity configuration offered for the listed Cisco UCS M7 platforms.

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