Additional standards exist that define variants of the standard PMC. For example, • PMC-X (
PCI-X PMC) defined by the
VITA 39 standard • PPMC (aka PrPMC; processor PMC) is defined by the VITA 32 standard. I.e. for allowing processors to have host or monarch support on a PMC. Additional signaling is defined so that the PrPMC can work as the host processor on a PCI bus. The intention is to allow a monarch PMC to control the PCI bus. This is usually a requirement if the PMC is to act as a host processor module. • CCPMC (conduction-cooled PMC) defined by the VITA 20 standard • XMC, or Switched Mezzanine Card (PMC with high-speed serial fabric interconnect) defined by the VITA 42 standard. XMC specifies a fifth connector ("P15") that supports
PCI Express (VITA 42.3) or other high-speed serial formats such as Serial
RapidIO (VITA 42.2) and Parallel
RapidIO (VITA 42.1). •
FMC – FPGA Mezzanine Card provides a standard mezzanine form factor that offers a flexible, modular I/O interface to an FPGA located on a host system baseboard or carrier card. • OAI-OAM (Open Accelerator Infrastructure - Accelerator Module) standard from
Open Compute Project, describes AI accelerator cards for blade servers, up to 8 cards on a universal base board, each with 7 PCIe x16 links, 12 V or 48 to 60 V power line, up to 600 W TBP (total board power) with air cooling, 600+ W with liquid cooling, interchangeable heatsinks and coldplates. ==References==