Thank you Cuzz for setting all these n00bs straight...Jeez.

3DFX was the first to introduce a SLI setup with the Voodoo 2 cards. It was basically connected with a ribbon cable similar to that of a 40 pin floppy cable. The Voodoo cards however were very short lived as they couldnt compete to the Nvidia TNT and or ATI Rage cards. Mainly due to the difference in memory interface and memory (8MB and 12MB versions for the Voodoo 2 vs the 16MB and 32MB TNT2 Cards)

It was top of the line at the time and could still render Q3 above 60 maxed.