A 9-pin header located at the bottom right of the board. It controls the power button, reset button, power LED, and HDD LED.
Dedicated 4-pin CPU fan header and 3-pin rear system fan header. h-ig41-uatx rev 1.1 schematic
The "h-ig41-uatx rev 1.1 schematic" is more than a PDF of lines and labels. It is a fossilized ecosystem: the last gasp of the FSB, the transition to DDR3, the compromise of integrated graphics, and the triumph of the micro-ATX form factor. It represents a moment when a single engineer in Taiwan decided where to route the 12V CPU sense line, what value pull-up resistor to put on the SMBus, and whether to include a jumper for CMOS clear. A 9-pin header located at the bottom right of the board