OAM (OCP Accelerator Module)
Beginner
A standard size and plug for accelerator boards, so different companies’ chips fit the same servers.
Novice
An Open Compute Project specification for a flat accelerator module that mounts onto a baseboard through two connectors, instead of plugging into a slot like a graphics card.
Expert
A 102 × 165 mm mezzanine with one or two x16 host links and up to seven inter-module links, powered from 48/54 V for high-TDP modules. A universal baseboard (UBB) carries eight of them with the scale-up wiring between them.