Pci Express X1 Slot; Pci Express X16 Slots; Jumper Settings; Clear Cmos Jumper: Clr_Cmos - XFX nForce 680i User Manual

Installing and Configuring the XFX nForce 680i SLI Motherboard

PCI Express x1 Slot

There is one PCI Express x1 slot that is designed to accommodate less
bandwidth-intensive cards, such as a modem or LAN card. The x1 slot provides
250 MB/sec bandwidth.

PCI Express x16 Slots

These two PCI Express x16 slots are reserved for graphics or video cards. The
bandwidth of the x16 slot is up to 4GB/sec (8GB/sec concurrent). The design
of this motherboard supports dual PCI-Express graphics cards using NVIDIA's
SLI technology with multiple displays.
When installing a PCI Express x16 card, be sure the retention clip snaps and
locks the card into place. If the card is not seated properly, it could cause a
short across the pins. Secure the card's metal bracket to the chassis back panel
with the screw used to hold the blank cover.

Jumper Settings

The motherboard contains a 3-pin BIOS configuration jumper that enables all
board configurations to be done in the BIOS Setup program.
The silk screen on the motherboard shows a

Clear CMOS Jumper: CLR_CMOS

The motherboard uses the CMOS RAM to store all the set parameters. The
CMOS can be cleared by removing the CMOS jumper.
Use the following procedure to clear CMOS:
1. Turn off the AC power supply and connect pins 1 and 2 together using the
jumper cap.
2. Return the jumper setting to normal (pins 2 and 3 together with the jumper
cap).
3. Turn the AC power supply back on.
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next to pin 1.