Intel® Pentium® Silver and Intel® Celeron® Processors Datasheet, Volume 1
Flexible Input/Output (I/O) is a technology that allows some of the PCH High Speed I/O (HSIO) lanes to be configured for connection to a PCIe* Controller, an Extensible Host Controller Interface (XHCI) USB 3.2 Controller, or an Advanced Host Controller Interface (AHCI) SATA Controller. Flexible I/O enables customers to optimize the allocation of the PCH HSIO interfaces to better meet the I/O needs of their system.
Figure below shows the High Speed I/O (HSIO) lane multiplexing.
The ten HSIO lanes on PCH supports the following configurations:
- Up to 8PCIe* Lanes
- Up to 2 SATA Lanes
- Up to 6 USB 3.x Lanes