Nvidia 680I LT SLI - Manual (Page 76)

Mainboard nForce 680i SLI/
Mainboard nForce 680i LT SLI
72
Use the following procedure to build your NVIDIA SLI-Ready PC system:
1. Install two SLI-Ready graphic cards into the two outer black PCI Express x16 slots on the
motherboard. Be sure to seat the graphic cards into the connectors.
SLI graphics cards in these slots
Two SLI graphics
cards installed in
the outer two
(block) PCI
Express slots on
the motherboard.
Note the blue PCI
Express slot is
empty.