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OCP NIC 3.0

OCP Network Interface Controller (NIC) 3.0 is an Open Compute Project (OCP) hardware specification that defines a standardized form factor, connector, and mechanical and electrical interface for network interface cards (NICs) used in open and hyperscale data center servers.

  • Standardized NIC form factor and connector for OCP-based servers (hardware form factor standard)
  • Mechanical and electrical interface definition between NIC and host system (hardware interface specification)
  • Support for multiple link speeds and media types as defined by OCP materials (data center networking)
  • Focus on interoperability of NIC modules across compliant server platforms (interoperability framework)
  • Alignment with broader OCP server and rack designs for modular networking hardware (open hardware ecosystem)

More About OCP NIC 3.0

OCP NIC 3.0 is a hardware specification within the Open Compute Project that standardizes how network interface cards integrate with servers designed under OCP guidelines. It describes the physical form factor, connector system, and host interface necessary for NICs to plug into and operate within open data center platforms. The specification targets hyperscale, cloud, and enterprise environments that adopt OCP-compliant servers and infrastructure.

The project’s purpose is to provide a consistent and reusable NIC module format (hardware form factor standard) so that different vendors can design compatible cards that fit the same mechanical envelope and connector layout. By defining dimensions, mounting, keep-out areas, and thermal envelopes, OCP NIC 3.0 enables server designers to plan chassis and airflow around a common NIC footprint. This standardization supports multiple NIC functions, including Ethernet connectivity at varying speeds, and allows different silicon or feature sets to be delivered through a common physical package.

On the electrical side, OCP NIC 3.0 specifies the host connector and pin-out (hardware interface specification), describing power delivery, signal lanes, management interfaces, and sideband control signals between the NIC and the host. These definitions allow server motherboards and baseboards to integrate a common OCP NIC 3.0 slot that can accept cards from multiple suppliers. The specification aligns with prevalent data center networking technologies and link speeds (data center networking), while leaving room for vendors to implement varied PHYs, controllers, or accelerators inside the NIC module as long as they follow the defined interface.

In enterprise and institutional environments, OCP NIC 3.0 is used as the NIC module format in OCP-compliant server platforms (data center infrastructure hardware). System integrators and operators can qualify a set of OCP NIC 3.0 cards that meet their bandwidth, offload, or management requirements and deploy them interchangeably across compatible servers. This modularity supports lifecycle management practices such as upgrading network capabilities or replacing NICs without redesigning the server chassis or motherboard.

From an ecosystem perspective, OCP NIC 3.0 fits into the broader OCP open hardware stack (open hardware ecosystem). It interoperates with OCP server, rack, and power specifications by providing a standard network I/O module that matches OCP mechanical and electrical design principles. For technical taxonomies, OCP NIC 3.0 sits under hardware interface and form factor standards for data center networking components, alongside other modular hardware specifications that define pluggable cards and their host interfaces.