Intel Q77 Technical Manual page 15

(5) JP2 : Mini PCI-E Power VCC3.3V/ 3VSB Function Select
(6) JP4 (3-pin): LVDS PVCC 5V / 3.3V Function Select
JP2
1
1-2 closed: MINI PCI-E VCC= VCC3.3V;
JP2
1
2-3 closed: MINI PCI-E VCC=3VSB
JP4
1
3
1-2 closed: LVDS PVCC= 5V
JP4
1
3
2-3 closed : LVDS PVCC= 3.3V
10
3
3