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Eight green DDR4 RDIMM modules in static bags

OWC

OWC 256GB (8x32GB) DDR4 3200 CL22 2Rx4 288-pin 1.2V ECC Registered RDIMM memory upgrade

SKU CH-354T-D1QX4

Eight 32 GB DDR4 3200 ECC registered DIMMs totalling 256 GB for Cisco UCS B200 M6, C125 M5, C220 M6, C240 M6 and C245 M6 servers

  • Capacity256GB (8 x 32GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 3200 (PC4 25600)
  • CAS LatencyCL22
  • Voltage1.2V
  • ECCYes

Capacity 256GB (8 x 32GB)

Show 3 more configurations
  • ECC registered design protects data integrity in servers
  • 256 GB kit with eight 32 GB modules maximises capacity
  • DDR4 3200 CL22 at 1.2 V balances speed and efficiency
  • Qualified for Cisco UCS B200 M6, C125 M5, C220 M6, C240 M6, C245 M6
  • Replaces Cisco part numbers 15-107238-01, UCSMRX32G2RW, UCSXMRX32G2RW

Server memory kit

This 256GB kit contains eight 32GB DDR4 3200 CL22 registered DIMMs built for Cisco UCS B200 M6, C125 M5, C220 M6, C240 M6 and C245 M6 servers. It delivers ECC error correction and registered signalling for stable operation in multi-socket platforms. The modules run at 1.2V and conform to JEDEC PC4-25600 specifications.

Build integration

Each 288-pin RDIMM occupies one memory slot and requires a motherboard that supports registered ECC DDR4; it will not work in standard desktop boards or alongside unbuffered or load-reduced DIMMs. Populating all channels with matched 32GB modules lets the memory controller run at the rated 3200 MT/s without down-clocking. The kit replaces Cisco part numbers 15-107238-01, UCSMRX32G2RW and UCSXMRX32G2RW.

Thermals and power

Bare modules without heat spreaders rely on chassis airflow for cooling; server fans typically keep temperatures well within JEDEC limits at the rated voltage. Registered buffers add slight latency but reduce electrical load on the memory controller, helping overall platform power efficiency. The 1.2V operating voltage matches the DDR4 standard for low-power server deployments.

Highlights

  • ECC registered design protects data integrity in servers
  • 256 GB kit with eight 32 GB modules maximises capacity
  • DDR4 3200 CL22 at 1.2 V balances speed and efficiency
  • Qualified for Cisco UCS B200 M6, C125 M5, C220 M6, C240 M6, C245 M6
  • Replaces Cisco part numbers 15-107238-01, UCSMRX32G2RW, UCSXMRX32G2RW

Specifications

BrandOWC
Part Number3R2D42R4256K
Capacity256GB (8 x 32GB)
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 3200 (PC4 25600)
CAS LatencyCL22
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Compatible SystemCisco 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

Does the CL22 latency become a bottleneck when all 256GB run at 3200 MT/s under sustained load?

CL22 is the rated CAS latency for the DDR4 3200 modules; the kit is tested at that speed and timing for continuous server operation.

How much heat do eight registered 1.2V DIMMs generate when the Cisco UCS runs 24/7?

Each 32GB RDIMM operates at 1.2V without a heat spreader; registered buffering reduces electrical load per pin, keeping thermals within standard server airflow limits.

Which Cisco UCS part numbers must already be installed for this 8×32GB kit to work?

The kit replaces Cisco parts 15-107238-01, UCSMRX32G2RW and UCSXMRX32G2RW and is validated for B200 M6, C125 M5, C220 M6, C240 M6 and C245 M6.

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