So I was wondering what I could do with my pci-express 4x slot on my Asus A8N-E motherboard. This board came out before the popular SLI boards but it was initially advertised as being able to run two graphics cards.
SLI however is a different animal...It requires a physical connection (between the two cards...) and software that recognizes the motherboard as a sli-enabled system. Tons of people were changing their 8 n 8 pci-e slot mobo's in to sli systems, simply by purchasing the hardware connection to connect the two cards...Nvidia caught on and changed their drivers to only recognize motherboard manufacturers that had payed for the SLI License.
Things could have changed since then tho...But i doubt they've changed that much.