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Four green DDR4 RDIMM modules with gold contacts and black chips, no heat spreaders

OWC

OWC 256GB (4x64GB) DDR4 3200 CL22 ECC RDIMM memory upgrade

SKU CH-4HJJ-6FY23

256 GB kit of four 64 GB DDR4 3200 CL22 ECC registered RDIMMs for Cisco UCS B200 M6, C125 M5, C220 M6, C240 M6 and C245 M6 servers

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latencyCL22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 256GB (4 x 64GB)

Show 3 more
  • 256GB total capacity from four 64GB modules
  • DDR4 3200 speed with CL22 latency for responsive server workloads
  • ECC registered design detects and corrects data errors automatically
  • 2V operation keeps power draw low in dense configurations
  • Validated for Cisco UCS B200 M6, C125 M5, C220 M6, C240 M6, C245 M6

Targeted Server Upgrade

This kit delivers 256 GB of DDR4 ECC registered memory across four 64 GB modules. It is built for Cisco UCS B200 M6, C125 M5, C220 M6, C240 M6 and C245 M6 servers that require registered DIMMs. Standard desktop boards and unbuffered or load-reduced memory configurations cannot use these modules.

DDR4 3200 Registered Limits

The modules run at 3200 MT/s with CL22 latency at 1.2 V on a 288-pin interface. Registered signalling adds one cycle of buffering, so the memory controller must support registered DIMMs. Mixing with unbuffered or load-reduced DIMMs is not supported and will prevent the system from posting.

Capacity and Headroom

Four 64 GB dual-rank modules fill four slots and provide 256 GB total capacity for heavily virtualised workloads or large in-memory databases. Servers with fewer than four available slots or a lower per-slot limit cannot accept the full kit. Systems that cap registered memory below 256 GB will not utilise the complete upgrade.

How it compares

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

Price $1,476.99
Pricier than about 64% 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 $5.77 per GB
Cheaper than about 67% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number3R2D42R4256S
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latencyCL22
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsCisco UCS B200 M6
Cisco UCS C125 M5
Cisco UCS C220 M6
Cisco UCS C240 M6
Cisco UCS C245 M6

Other versions of this model

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Questions about this item

Should I buy the 256GB kit or look for a smaller capacity?

The kit provides 256GB total using four 64GB modules; choose it when your Cisco UCS server needs the maximum supported memory per channel.

What does the DDR4 3200 rating deliver in my Cisco UCS server?

DDR4 3200 (PC4-25600) runs at 3200 MT/s with CL22 latency, giving the rated throughput when all four 2Rx4 registered DIMMs are populated.

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

No — they are registered ECC DDR4 modules designed for Cisco UCS B200 M6, C125 M5, C220 M6, C240 M6 and C245 M6 servers only.

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