IEI Integration NOVA-945GSE v2.01 - Manual (Page 106)

NOVA-945GSE 5.25” SBC
Page 104
BIOS Menu 8: Power Configuration
Select AT/ATX Power [ATX Power]
Use the Select AT/ATX Power BIOS option to select the power mode for the system.
AT Power Use AT power mode
ATX Power D EFAULT Use ATX power mode
BY
HARDWARE
The power mode is selected by the on-board jumper.