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Eight green DDR4 RDIMM modules in anti-static tray

OWC

OWC 256GB (8x32GB) DDR4 2400 CL17 ECC Registered RDIMM memory upgrade

SKU CH-6XW1-XQCJ2

Eight 32 GB DDR4 2400 CL17 ECC registered RDIMMs totalling 256 GB for Cisco UCS B200 M4 and C220 M4 servers

  • Capacity256GB (8 x 32GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2400 (PC4 19200)
  • CAS LatencyCL17
  • Voltage1.2V
  • ECCYes

Capacity 256GB (8 x 32GB)

  • 256 GB server capacity from eight 32 GB modules
  • DDR4 2400 CL17 speed for responsive workloads
  • ECC registered design protects data integrity
  • 2 V operation reduces power draw
  • Validated for Cisco UCS B200 M4 and C220 M4

Server memory upgrade kit

This OWC kit supplies 256 GB of DDR4 ECC Registered RDIMM memory across eight 32 GB modules. It is built for Cisco UCS B200 M4 and C220 M4 servers and workstations that require registered error-correcting memory. Standard desktop computers cannot use these modules.

Registered ECC constraints

Registered ECC RDIMMs cannot be mixed with unbuffered or load-reduced DIMMs in the same system. The memory operates at 1.2 V with a CAS latency of CL17 and conforms to the PC4-19200 (DDR4 2400) JEDEC standard. Compatibility is limited to platforms that explicitly support registered ECC DDR4.

Eight-module capacity limit

The kit delivers its full 256 GB only when all eight 32 GB modules are installed in a supported Cisco UCS server. Systems with fewer DIMM slots or a lower maximum memory ceiling will not accept the complete kit.

Highlights

  • 256 GB server capacity from eight 32 GB modules
  • DDR4 2400 CL17 speed for responsive workloads
  • ECC registered design protects data integrity
  • 2 V operation reduces power draw
  • Validated for Cisco UCS B200 M4 and C220 M4

Specifications

BrandOWC
Part Number2R4D42R4256K
Capacity256GB (8 x 32GB)
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2400 (PC4 19200)
CAS LatencyCL17
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Compatible SystemCisco UCS B200 M4
Cisco UCS C220 M4

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Questions about this item

Should I buy this 256GB kit or look for a different capacity for my Cisco UCS server?

This kit provides 256GB total using eight 32GB modules, matching the 288-pin DDR4 2400 CL17 ECC Registered RDIMM specification required by the Cisco UCS B200 M4 and C220 M4.

What does the DDR4 2400 PC4-19200 rating mean when the modules are installed in a Cisco UCS B200 M4?

The modules will run at 2400MHz with CL17 latency at 1.2V, delivering the full PC4-19200 bandwidth the platform expects from registered ECC RDIMMs.

Will these 288-pin DDR4 ECC Registered RDIMMs work in a standard desktop motherboard?

No, they are registered ECC modules designed for server and workstation platforms such as the Cisco UCS B200 M4 and C220 M4 and are not compatible with unbuffered desktop memory slots.

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