Acnodes PCH 3591 - Manual (Page 13)

Figure 2.3: Jumpers and Connectors Location_
Board Bottom
2.3 Jumpers Setting and Connectors
1. RTC/SRTC:
(2.0mm Pitch 1X2 Pin Header)CMOS clear jumper, CMOS clear
operation will permanently reset old BIOS settings to factory defaults.
RTC/SRTC CMOS
OPEN NORMAL
(default)
CLOSE 1-2 Clear CMOS
Procedures of CMOS clear:
5.4.1.1 Turn off the system and unplug the power cord from the power outlet.
5.4.1.2 To clear the CMOS settings, use the jumper cap to close pins1 and 2 for about
3 seconds then reinstall the jumper clip back to pins open.
5.4.1.3 Power on the system again.
5.4.1.4 When entering the POST screen, press the <F1> or <DEL> key to enter CMOS
Setup Utility to load optimal defaults.
5.4.1.5 After the above operations, save changes and exit BIOS Setup.
2. JP2:
(2.0mm Pitch 1X2 Pin Header), ATX Power and AT Power setting jumper .