The PC821 is a high-performance, PCI Express card with advanced DSP capabilities and multiple I/O options. It supports one VITA 57.4-compliant HSPC FPGA Mezzanine Cards (FMCs) and one VITA 57.1 compliant HPC FMC site. Both FMC sites are closely coupled to the Virtex or Kintex UltraScale FPGA and a DDR4-2133 SDRAM SO-DIMM.