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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

  • Total capacity256 GB (8 × 32 GB)
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latencyCL22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 256GB (8 x 32GB)

Show 3 more
  • 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.

How it compares

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

Price $1,787.99
Pricier than about 67% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (8 × 32 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $6.98 per GB
Cheaper than about 57% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number3R2D42R4256K
Total capacity256 GB (8 × 32 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

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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