Quote Originally Posted by GripS View Post
No. It's at the hardware level. Skulltrail has SLI capability only because of special chips from nvidia(nforce 100). Existing P35/X38 motherboards do not have these chips so no. You will never see SLI on your P35/X38 based motherboard.
There's nothing technically different between sli and crossfire, they're the same pci express functionality. What's probable is that Nvidia wrote their drivers to require identifying a nvidia chipset to run, and rather than rewrite their drivers to ignore this requirement, they make vendors buy their chipset instead, which gets the drivers past the nvidia check; it's like old software dongles. They could have added some unecessary hardware process, but it's more likely they're relying on legal and software means to inflicting their nvidia requirement.