Nvidia nForce 680i, User Manual, Page: 32 / 141

Installing and Configuring the NVIDIA nForce 680i SLI Motherboard
18
Power Connections
This motherboard requires an ATX power supply. To support a PCI Express
motherboard with the addition of dual graphics cards using NVIDIA SLI
technology, you are going to need a minimum of a 500W power supply. Make
sure you have enough power to cover all the expansion cards you will be
installing. To determine what you power requirements are for your specific
configuration, refer to www.slizone.com .
24-pin ATX Power
(PWR1)
PWR1
is the main power supply connector located along the edge of the board
next to the DIMM slots. Make sure that the power supply cable and pins are
properly aligned with the connector on the motherboard. Firmly plug the power
supply cable into the connector and make sure it is secure.
Figure 3. PWR1 Motherboard Connector
Table 1. PWR1 Pin Assignments
Connector Pin Signal Pin Signal
1 +3.3V 13 +3.3V
2 +3.3V 14 -12V
3 GND
15 GND
4 +5V 16 PS_ON
5 GND 17 GND
6 +5V 18 GND
7 GND 19 GND
8 PWROK 20 RSVD
9 +5V_AUX
21 +5V
10 +12V 22 +5V
11 +12V 23 +5V
24
13
12 1
12 +3.3V 24 GND
PWR1 connector
Plug power cable
from system power
supply to PWR1