Skip to main content

OCP Accelerator Module (OAM)

OCP Accelerator Module (OAM) is an Open Compute Project hardware specification that defines a common form factor, electrical interface, and mechanical design for high-power compute accelerators such as GPUs and custom ASICs (category: hardware standards).

  • Standardized module form factor for high-power accelerators (category: hardware standards).
  • Defined power, thermal, and mechanical envelope for dense accelerator deployment (category: data center infrastructure).
  • Common high-speed interconnect and signaling interface for accelerator connectivity (category: interconnect standards).
  • Mechanical and electrical reference for carrier boards, trays, and chassis integration (category: server hardware design).
  • Ecosystem framework under the Open Compute Project for interoperable accelerator modules from multiple vendors (category: open hardware ecosystem).

More About OCP Accelerator Module

The OCP Accelerator Module (OAM) project defines a standardized hardware module format for compute accelerators, created under the Open Compute Project (OCP) to support dense, high-power accelerator deployments in data center environments. The specification addresses the integration of GPUs, custom ASICs, and other accelerator devices into servers and racks by providing a common mechanical, electrical, and thermal design framework (category: data center accelerator infrastructure).

OAM specifies the physical outline, connector arrangement, and mounting scheme for accelerator modules, enabling them to fit into compatible carrier boards and chassis from different manufacturers (category: hardware standards). It defines power delivery constraints and interfaces so that high-wattage accelerators can be supplied reliably within the module envelope. Thermal design guidelines and module geometry support the use of shared cooling solutions such as heat sinks and airflow channels at the platform level, rather than bespoke designs per device (category: thermal management).

The project also provides guidance for high-speed I/O interfaces between accelerators and host systems, and for accelerator-to-accelerator links on shared baseboards (category: interconnect standards). By specifying connector types, lane counts, and placement, OAM enables system designers to build baseboards and trays that can host modules from different vendors, as long as they follow the OAM-compliant signaling and mechanical rules. This supports configurations such as multi-accelerator baseboards, expansion trays, and rack-level accelerator pools (category: modular server architecture).

In enterprise and cloud data centers, OAM is used as a reference for designing accelerator baseboards, sleds, and enclosures that can accept multiple OAM-compliant modules in a uniform way (category: server platform design). System integrators and hardware vendors can design OAM-compatible platforms that host various accelerator SKUs without redesigning the entire mechanical and power delivery solution for each device. This reduces integration complexity for large-scale deployments of Artificial Intelligence (AI), High performance computing (HPC), and data processing accelerators.

Within the broader OCP ecosystem, the OAM specification aligns with other OCP hardware projects focused on open, interoperable server and rack designs (category: open hardware ecosystem). It is positioned in a directory under accelerator and server hardware standards, providing a reference point for enterprises evaluating form factors for accelerator-intensive workloads. OAM’s standardized approach to module definition supports interoperability, vendor choice, and repeatable integration patterns for accelerator hardware in data center infrastructure.