Intel Q77 Technical Manual page 14

(3) JP9 (3-pin): Rear Panel USB 2.0 Port Power On Function Setting
(4) JP3(3-pin): USB 1/2 Header Power On Function Setting
JP9
1
3
1-2 closed : Rear Panel USB 2.0 Port Power-on Disabled (Default);
JP9
1
3
2-3 closed: Rear Panel USB 2.0 Port Power-on Enabled
JP3
1
1-2 closed : USB1/2 Header Power-on Disabled (Default);
JP3
1
2-3 closed: USB1/2 Header Power-on Enabled
9
3
3