XFX nForce 680i User Manual page 22

Installing and Configuring the XFX nForce 680i SLI Motherboard
Onboard 1394 (-E ) (optional)
Support hot plug
Two 1394a port with rate of transmission at 400 Mbps
One 1394b port with rate of transmission at 800 Mbps
Onboard Audio (-8)
Supports 8-channel audio
Supports S/PDIF output
Supports Jack-Sensing function
Dual PCI Express x16 Support
Supports 4 GB/sec (8 GB/sec concurrent) bandwidth
Low power consumption and power management features
Green Function
Supports ACPI (Advanced Configuration and Power Interface)
Supports S0 (normal), S1 (power on suspend), S3 (suspend to RAM), S4
(Suspend to disk - depends on OS), and S5 (soft - off)
Expansion Slots
Two PCI slots
Two PCI Express x1 slot
Three PCI Express x16 Graphics slots
Two are electrical x16 for true dual-graphics SLI configurations
One is electrical x8 for future GPU physics applications
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