Axiomtek PICO841 - Manual (Page 69)

PICO841 Intel
®
Atom
TM
Processor E3845/E3827 Pico-ITX Board
AMI BIOS Setup Utility 63
 South Bridge – USB Configuration
XHCI Mode
When Advanced\Miscellaneous Configuration\OS Selection is set to Windows
®
8.x, XHCI
mode is Enabled.
Meanwhile, when Advanced\Miscellaneous Configuration\OS Selection is set to Windows
®
7, XHCI mode is Smart Auto.