ECS 649-M2 Manual page 17

Connecting 20/24-pin power cable
Users please note that the 20-pin and 24-pin power cables can both be con-
nected to the ATX_POWER connector. With the 20-pin power cable, just
align the 20-pin power cable with the pin 1 of the ATX_POWER connector.
However, using 20-pin power cable may cause the system to become unbootable
or unstable because of insufficient electricity. The minimum recommend power
is 300W for a fully-configured system.
20-pin power cable
24-pin power cable
CPU_FAN: CPU Cooling Fan Connector
Pin Signal Name
1
GND
2
+12V
3 Sense
4
Control
Users please note that the fan connector supports the CPU cooling fan of
1.1A~2.2 (26.4W max.) at +12V.
SYS_FAN/PWR_FAN: FAN Power Connectors
Pin Signal Name
1
GND
2
+12V
3 Sense
ATX12V: ATX 12V Power Connector
Pin Signal Name
1
Ground
2
Ground
3
+12V
4
+12V
With ATX v1.x power supply, users please
note that when installing 20-pin power cable,
the latche of power cable falls on the left
side of the ATX_POWER connector latch,
just as the picture shows.
With ATX v2.x power supply, users please
note that when installing 24-pin power cable,
the latches of power cable and the
ATX_POWER match perfectly.
Function
System Ground
Power +12V
Sensor
FAN Control Signal
Function
System Ground
Power +12V
Sensor
Installing the Motherboard
11