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Green rectangular DDR4 RDIMM with black chips and gold contacts

OWC

OWC 128GB DDR4 3200 PC4-25600 CL22 8Rx4 288-pin ECC Registered RDIMM memory upgrade

SKU CH-GXQD-XD8PB

A single 128GB DDR4 3200 ECC registered RDIMM for Cisco UCS B200 M6, C125 M5, C220 M6, C240 M6 and C245 M6 servers

  • Total capacity128 GB
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latency22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank8Rx4
  • 128 GB single module doubles server capacity instantly
  • ECC registered design prevents data corruption under load
  • DDR4 3200 CL22 at 1.2 V delivers high throughput efficiently
  • Validated for Cisco UCS B200 M6, C125 M5, C220 M6, C240 M6, C245 M6
  • JEDEC and RoHS compliant for warranty-safe upgrades

Cisco UCS server memory upgrade

This 128 GB DDR4 ECC registered DIMM is built for Cisco UCS B200 M6, C125 M5, C220 M6, C240 M6 and C245 M6 servers. It targets administrators who need to expand capacity on supported platforms without mixing memory types. The module operates at 1.2 V and follows JEDEC PC4-25600 specifications.

Registered ECC with 8Rx4 organisation

The single specification that decides fit is the registered ECC design with 8Rx4 ranking. This memory will not work in standard desktop computers and cannot be mixed with unbuffered or load-reduced DIMMs. Systems must support registered ECC DDR4 at 3200 MT/s with CL22 latency for correct operation.

Backward-compatible speed grades

The module also runs at 2133, 2400, 2666 and 2933 MT/s, allowing installation in older slots that do not reach the native 3200 MT/s rate. No heat spreader is included, so airflow in the chassis must handle thermal management. JEDEC and RoHS compliance keeps the upgrade warranty-safe for the listed Cisco UCS models.

How it compares

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

Price $700.99
Pricier than about 56% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
CAS latency 22
Typical for this category: the median of 483 items is 22.
Price per GB $5.48 per GB
Cheaper than about 70% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number3R2D48R4128G
Total capacity128 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latency22
ECC supportYes
Buffer typeRegistered
Memory rank8Rx4
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

Questions about this item

What does the 3200 MT/s speed actually deliver when the module is installed in a Cisco UCS server?

The module runs at DDR4-3200 with CL22 timing and 1.2 V, providing the full PC4-25600 bandwidth the server's memory controller supports.

How does the 288-pin ECC Registered DDR4 interface limit mixing with other memory types?

The registered design and ECC function prevent mixing with unbuffered or load-reduced DIMMs; only identical registered ECC modules can share a channel.

Will the 288-pin form factor fit the DIMM slots in a Cisco UCS C240 M6 without clearance issues?

Yes, the standard 288-pin RDIMM height matches the server's memory slots and no heat spreader is present to interfere with adjacent components.

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