User guide

Hardware Installation
23
Fan Connections
There are two fan connections, the system fan and the CPU fan. The fan speed
can be detected and viewed in the
PC Health Status section of the CMOS Setup.
Both fans are automatically turned off after the system enters S3, S4 and S5
mode.
Note that the CPU fan cable can be either a 3-pin or a 4-pin
connector. Connect a 3-pin connector to pins 1, 2, and 3 on
the motherboard connector.
CPU Fan Connector
4 3 2 1
GND SENSE
PWR CONTRO
L
The nForce 680i LT SLI SPP and MCP have active
fans to help to cool the chips. The fans plu
g
into a
3-pin connector.
Fan Connector
3 2 1
GND
+12V
SENSE
nForce 680i LT SLI
MCP fan connector.
nForce 680i LT SLI SPP fan connector.