There are 3 CMOS chips on the SR-2 Classified motherboard.  Two of them are attched to the motherboard and the third one is in a socket with two doors on the top.  They are located to the bottom right between the POST code display and the SATA ports.  The switch to change between them is below and to the right of the CMOS chisps and is a three position switch.  Using this switch you can change between BIOSes with different settings.