[citation][nom]meat81[/nom]Well since it does not look like Nvidia will be making any new AMD chipsets (dammit!) this is the next best thing Nvidia can cash in on. Freaking wish AMD would have SLI on boards for Dozer when it comes out. AMD really put themselves in a corner not continuing that relationship.[/citation]
SLi doesn't work on Intel or AMD/ATI chipsets because of nVidia, its NOT an AMD issue. Hence, CF (CrossFire) works on intel chipsets... but maynot work on Nvidia (I don't know if nVidia is blocking it or AMD is).
nVidia came into the chipset market with a loop-hole from the Xbox(original), and by the time nForce2 came out, they exceeded VIA and almost equal to intel chipsets back in the early-mid 2000s. Now, VIA chipsets were good to great since the KT-133~KT400. But some nForce boards included a pretty good onboard video and feature set that VIA didn't have access to. And the nVidia name had more "market worth".
With the ending of Core2 chipsets, nVidia had no license to talk to future intel CPUs. So... thats that, just low-end Core2 replace boards for the $50 market.
nVidia still makes chipsets for AMD CPUs, but again - for the bottom end $50 price market with sub-par products with limited expansion... like 2 memory slots. So unless nVidia changes something... they'll always be the bottom end, with VIA sitting right next to them on the step.
For performance, sales, stability, certification... intel for intel CPU and AMD for AMD CPUs ends up being the best combination.