Installing and Configuring the BFG NVIDIA nForce 680i LT SLI Motherboard
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.
Card edge
PWR1 connector Plug power cable from system power supply to PWR1
Figure 3. PWR1 Motherboard Connector
Table 1. PWR1 Pin Assignments
Connector | Pin | Signal | Pin | Signal |
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| 1 | +3.3V | 13 | +3.3V |
| 2 | +3.3V | 14 |
|
| 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 |
| 12 | +3.3V | 24 | GND |
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