Applicable SongShow Plus Versions:
This article applies to all versions of SongShow Plus.
SLI is a technology available only on NVidia based video cards. It allows two paired video cards to run as one. These cards must be identical. SLI exists only on PCI Express mother boards with SLI enabled. One major drawback is that SLI supports only a single monitor.
Similar technology for ATI/AMD cards exists called Crossfire.
While suitable in some gaming applications, this technology is neither tested or recommended for use with SongShow Plus.