When licensed for high fidelity solves, the solver license itself allows up to 4 cores to be used. If additional cores are desired, Discovery attempts to acquire the appropriate HPC licenses:
For floating license users, the HPC licenses are typically Ansys HPC (anshpc) or Ansys HPC Pack (anshpc_pack) licenses.
For subscription license users, the Ansys Discovery Ultimate CPU Core Extension (disc_ult_cpuext) allows use of additional cores.
Discovery does not request HPC capabilities beyond the number of cores available on the machine. In the event of a shortage of HPC licenses, the solve proceeds using fewer cores, and you are notified that Discovery cannot obtain HPC licenses.
When solving in CPU mode, HPC preferences are derived from the Max number of processors option on the Settings panel. The Max number of processors option can be set to Use solver default, Use maximum available, or Specify number of cores.