ATX-Q670A
2-20
CAUTION:
Do not forget to connect the fan cables to the fan headers.
Insufficient air flow inside the system may damage the motherboard
components. These are not jumpers! Do not place jumper caps on the fan
headers!
3. CPU and Chassis Fan headers (4-pin CPU_FAN, 4-pin CHA_FAN1~3)
Connect the fan cables to the fan headers on the motherboard, ensuring that
the black wire of each cable matches the ground pin of the header.
PWM
SENSE
VCC GND
CHA_FAN3
A
CPU_FAN
B
CHA_FAN1
C
CHA_FAN2
D
A B
C
D
PIN 1
GND S_BIOS_CLK_1Q S_BIOS_MOSI_1Q (NC)
+3V_SPI
S_BIOS_CS0#_1Q S_BIOS_MISO_1Q
(NC)
SPI_1
2. BIOS Programmable header (8-pin SPI_1)
Use this header to flash the BIOS ROM.