Cisco UCS C225 M6 SFF Rack Server Data Sheet

Data Sheet

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Updated:November 7, 2022

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The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.

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Updated:November 7, 2022


Product overview

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The Cisco UCS C225 M6 SFF Rack Server extends the capabilities of the Cisco Unified Computing System portfolio in a 1-Rack-Unit (RU) form factor with the addition of AMD CPUs as well as 16 DIMM slots per CPU for 3200-MHz DDR4 DIMMs with individual DIMM capacity points up to 256 GB. The maximum memory capacity for two CPUs is 8 TB (for 32 x 256 GB DDR4 DIMMs1).

Features and benefits

There are several front drive and rear riser configurations, as listed below:

Front drives

     Option 1: Up to 10 SAS/SATA/NVMe drives (up to 4 of the drives can be NVMe)

     Option 2: Up to 10 NVME drives (All drives are NVMe)

Rear PCIe risers

     One to three half-height PCIe risers, or

     One to two full-height PCIe risers

The server provides an internal slot for one of the following:

     Cisco 12G RAID controller with cache backup to control SAS/SATA drives, or

     Cisco 12G SAS passthrough HBA to control SAS/SATA drives

Note:       NVMe drives are controlled directly from the CPUs.

The UCS C225 M6 server has a single 1 GbE management port. A modular LAN on motherboard (mLOM) / Open Compute Project (OCP) 3.0 module provides up to two 100 GbE ports. A connector on the front of the chassis provides KVM functionality.

The Cisco UCS C225 M6 server can be used either as a standalone or as part of the Cisco Unified Computing System, which unifies computing, networking, management, virtualization, and storage access into a single integrated architecture, enabling end-to-end server visibility, management, and control in both bare-metal and virtualized environments.

Product specifications

Table 1.           C225 M6 SFF specifications

Capability / feature



One Rack Unit (1RU) chassis


One or two AMD Milan or Rome processors


32 slots for Registered DIMMs (RDIMMs) or Load-Reduced DIMMs (LRDIMMs)

Multi-bit error protection

This server supports multi-bit error protection.


The Cisco Integrated Management Controller (CIMC) provides video using the Matrox G200e video/graphics controller:

  Integrated 2D graphics core with hardware acceleration
  Embedded DDR memory interface supports up to 512 MB of addressable memory (8 MB is allocated by default to video memory)
  Supports display resolutions up to 1920 x 1200 16 bpp @ 60 Hz
  High-speed, integrated 24-bit RAMDAC
  Single-lane PCI-Express host interface running at Gen 1 speed

Power subsystem

Up to two of the following hot-swappable power supplies:

  1050 W (AC)
  1050 W (DC)
  1600 W (AC)
  2300 W (AC)

One power supply is mandatory; one more can be added for 1 + 1 redundancy.

Front panel

A front-panel controller provides status indications and control buttons.


This server supports the Advanced Configuration and Power Interface (ACPI) 4.0 standard.


Eight hot-swappable fans for front-to-rear cooling


The InfiniBand architecture is supported by the PCIe slots.

Expansion slots

Three half-height riser slots

  Riser 1 (controlled by CPU 1):

      One x16 PCIe Gen 4.0 slot (Cisco VIC), half-height, 3/4 length

  Riser 2 (controlled by CPU 1):

      One x8 PCIe Gen 4.0 slot, half-height, 3/4 length

  Riser 3 (controlled by CPU 1):

      One x16 PCIe Gen 4.0 slot (Cisco VIC), half-height, 3/4 length


Two full-height riser slots

  Riser 1 (controlled by CPU 1):

      One x16 PCIe Gen 4.0 slot (Cisco VIC), full-height, 3/4 length

  Riser 2 (controlled by CPU 1):

      One x16 PCIe Gen 4.0 slot (Cisco VIC), full-height, 3/4 length


Rear panel:

  One 1Gbase-T RJ-45 management port
  One RS-232 serial port (RJ45 connector)
  One DB15 VGA connector
  Two USB 3.0 port connectors
  One flexible modular LAN on motherboard (mLOM)/OCP 3.0 slot that can accommodate various interface cards

Front panel:

  One KVM console connector (supplies two USB 2.0 connectors, one VGA DB15 video connector, and one serial port (RS232) RJ45 connector)

Internal storage devices

Drive storage:

Drives are installed into front-panel drive bays, which provide hot-swappable access for SAS/SATA or NVMe drives. The server is orderable in two different versions:

  UCSC-C225-M6S (option 1):

      Up to 10 SFF SAS/SATA Hard Drives (HDDs) or SAS/SATA Solid State Drives (SSDs)

      Optionally, up to four SFF NVMe PCIe SSDs (replacing SAS/SATA drives). These drives must be placed in front drive bays 1, 2, 3, and 4 only and are controlled from CPU1. The rest of the bays (5 - 10) can be populated with SAS/SATA SSDs or HDDs.

  UCSC-C225-M6N (option 2):

      Up to 10 SFF NVMe PCIe SSDs only. All drives are controlled from CPU1. Only one CPU is required when choosing NVMe SSDs.

Other storage:

  A ministorage module connector on the motherboard supports a boot-optimized RAID controller carrier that holds two SATA M.2 SSDs. Mixing different capacity SATA M.2 SSDs is not supported.

Integrated management processor

A Baseboard Management Controller (BMC) runs Cisco Integrated Management Controller (CIMC) firmware.

Depending on your CIMC settings, the CIMC can be accessed through the 1-GE dedicated management port or a Cisco Virtual Interface Card (VIC).

CIMC manages certain components within the server, such as the Cisco 12G SAS HBA.

Storage controllers

One Cisco M6 12G SAS RAID controller or up to two Cisco 12G SAS HBAs plug into a dedicated slot.

Cisco M6 12G SAS RAID Controller with 4GB FBWC:

  RAID support (RAID 0, 1, 5, 6, 10, 50, 60, SRAID0, and JBOD mode)
  Supports up to 24 internal SAS/SATA drives
  Plugs into a dedicated slot

Cisco 12G SAS HBA:

  No RAID support
  JBOD/Pass-through Mode support
  Supports up to 16 SAS/SATA internal drives
  Plugs into a dedicated slot

Modular LAN on Motherboard (mLOM)/

Open Compute Project (OCP) 3.0 slot

The dedicated mLOM/OCP 3.0 slot on the motherboard can flexibly accommodate the following cards:

  Cisco Virtual Interface Cards (VIC)
  OCP 3.0 network interface card (UCSC-O-ID10GC)

Cisco Intersight

Cisco Intersight provides server management capabilities.

Note: Cisco UCS Manager (UCSM) support is not available for this server.

Cisco Integrated Management Controller (CIMC)

Requires CIMC Release 4.2(1) or later

Operating temperature

Minimum 10°C to 35°C (50°F to 95°F) with no direct sunlight (If any A10, A100, or rear HDDs are installed, the 35°C (50°F) restriction changes to 30°C (86° F).)

Maximum allowable operating temperature derated

1C/300 m (1F/547 ft) above 950 m (3117 ft)

Extended operating temperature

5°C to 40°C (41°F to 104°F) with no direct sunlight

Maximum allowable operating temperature de-rated 1C/175 m (1F/319 ft) above 950 m (3117 ft)

5°C to 4°5C (41°F to 113°F) with no direct sunlight

Maximum allowable operating temperature de-rated 1C/125 m (1F/228 ft) above 950 m (3117 ft)

System performance may be impacted when operating in the extended operating temperature range.

Operation above 40°C is limited to less than 1% of annual operating hours.

Hardware configuration limits apply to extended operating temperature range.

Nonoperating temperature

Below -40°C or above 65°C (below -40°F or above 149°F)

Maximum rate of change (operating and nonoperating)

20°C/hr (36°F/hr)

Operating relative humidity

8% to 90% and 24°C (75°F) maximum dew-point temperature, noncondensing environment

Nonoperating relative humidity

5% to 95% and 33°C (91°F) maximum dew-point temperature, noncondensing environment

Operating altitude

0 m to 3050 m {10,000 ft)

Nonoperating altitude

Below 0 m or above 12,000 m (39,370 ft)

Ordering information

For information about installing or upgrading your server, see the hardware installation guide. For ordering information, see the Cisco UCS C225 M6 specifications sheet.

Table 2.           Ordering information




Cisco UCS M6 rack, blade, chassis Major Line Bundle (MLB)

This MLB consists of the server nodes (UCSC-C225-M6S and UCSC-C225-M6N) with software PIDs. Use this PID to begin a new configuration.


Up to 10 SFF front drives with no CPU, memory, HDD, PCIe cards, or power supply. All drives can be SAS/SATA HDDS or SSDs, or, optionally, any of bays 1, 2, 3 and 4 can be NVMe PCIe SSDs and the rest (bays 5 through 10) can be SAS/SATA HDDs or SSDs.


Up to 10 SFF front drives (NVMe PCIe SSDs only) with no CPU, memory, HDD, PCIe cards, or power supply

Notes: This product may not be purchased outside of the approved bundles (must be ordered under the MLB).

Warranty information

The Cisco UCS C225 M6 server has a three-year, Next-Business-Day (NBD) hardware warranty and a 90-day software warranty.

Cisco support

Augmenting the Cisco Unified Computing System (Cisco UCS) warranty, Cisco Smart Net Total Care and Cisco Solution Support services are part of Cisco's technical services portfolio. Smart Net Total Care combines Cisco's industry-leading and award-winning foundational technical services with an extra level of actionable business intelligence that is delivered to you through the smart capabilities in the Smart Net Total Care portal. Learn more about Smart Net Total Care.

Cisco Solution Support includes both Cisco product support and solution-level support, resolving complex issues in multivendor environments on average 43 percent more quickly than with product support alone. Cisco Solution Support is a critical element in data center administration, helping to rapidly resolve any issue encountered while maintaining performance, reliability, and return on investment.

This service centralizes support across your multivendor Cisco environment for both our products and solution partner products that you have deployed in your ecosystem. Whether there is an issue with a Cisco product or with a solution partner product, just call us. Our experts are the primary point of contact and own the case from first call to resolution. Learn more about Cisco Solution Support.

Product sustainability

Information about Cisco’s Environmental, Social, and Governance (ESG) initiatives and performance is provided in Cisco’s Corporate Social Responsibility (CSR) and sustainability reporting.

Table 3.           Cisco environmental sustainability information

Sustainability topic



Information on product-material-content laws and regulations


Information on electronic waste laws and regulations, including our products, batteries, and packaging

WEEE compliance

Information on our product takeback and reuse program

Cisco Takeback and Reuse Program

Sustainability inquiries


Operating and nonoperating conditions

Product specifications


Product packaging weight and materials


Product environmental information

Product environmental information for users per Commission Regulation (EU) 2019/424

Cisco and partner services

Cisco and our industry-leading partners deliver services that can accelerate your transition to a Cisco UCS X-Series Modular System solution. Cisco Unified Computing Systems Services can help you create an agile infrastructure, accelerate time to value, reduce costs and risks, and maintain availability during deployment and migration. After deployment, our services can help you improve performance, availability, and resiliency as your business needs evolve and help you further mitigate risk. For more information, visit

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