ASROCK SP2C741D16HM3 User Manual page 34

The illustration shows how jumpers are setup. When the jumper cap is placed on the pins,
the jumper is "Short". If no jumper cap is placed on the pins, the jumper is "Open".
BIOS Swap Override
Jumper
(BIOS_SWAP_OVER-
RIDE)
(see p.6, No. 5)
26
Open: Disable Override (Default)
Short:
2-pin Jumper
Enable Override