actually, Nvidia's SLI is a different technology from Alienware's implementation. Alienware works with ANY pci-e videocard, and it's a external solution (i dunno, some adapter or something); while Nvidia's SLI is native. Appears, all latest gen pci-e nvidia videocards (6800 & new 6600) include sli connector. By default, nvidia's solution is better because there is less overhead, and it will work with any mobo that has 2 pci-e slots but with future ones only (like nforce 4). Right now, only high-end intel server mobo has those 2 slots. Hopefully, early next year u would be able to afford cheapo sli with 2 6600's that would yield 512mb videomemory and about 16-18k in 3dmark03. with 6800 it'd be faster but much more expensive Oh, and doesn't this belong in a different forum?