A secondary BIOS allows users to experiment with custom BIOS’s with relatively little risk. If things go spectacularly wrong, it’s easy to recover the original BIOS with the flimp of a switch. The secondary BIOS could also unlock more overclocking potential.
Switching the BIOS is straightforward. Users need to power off their rig, switch the BIOS selector to a secondary position and that’s it.
EGVA GTX 780, 770 and 760 cards support dual BIOS, but some may require a BIOS update to unlock dual BIOS functionality. Three GTX 770 cards have triple BIOS, for users who like to get it wrong more than once.