Just below the rear panel of the board, ABIT placed two jumper blocks. The jumper closest to the CPU socket area is marked KBDPWR, most likely indicating that it is to enable a keyboard power on function. The other jumper is located just above the PWRFAN1 fan header, and is unmarked. Note that neither jumper is referenced in the manual and no manual addendum was enclosed to explain the function of the jumpers.
Editor's Note: ABIT replied this morning saying, "The two extra jumpers only for users to disable the PS/2 or USB mouse standby 5V voltage,
so that users could not be disturbed by the light of optical mouse in silent night."
Translation: If you move the jumpers over from default, the light from an optical mouse will turn off when the system is shut down.