Pci Express X1 Slots; Sli Switchboard Slot - Abit NI8 SLI Series User Manual

Hardware Setup 2-21

(16). PCI Express x1 Slots

These slots are used to attach the next generation of I/O architecture.

(17). SLI Switchboard Slot

This slot and the pre-installed ABIT SLI Switch set the graphic mode to either Normal or SLI mode.
User's Manual