Well I've seen hardly any Core Duo motherboards that support SLI. I am not going to buy that if I can't get SLI or Crossfire as I want to be able to upgrade with another card like that. My Graphics card has a 3 year limited warranty and it is still under it I believe so I'm going to try and send it to them to fix.
Pretty much every Intel 975X-based board will support Crossfire. And on the flip side, nVidia nForce based boards should support SLI (at least 570 and 680 boards).
Yeah, but why wouldn't they say on the box they support that? I really don't trust buying it and just saying I hope it works. The old Mobos I was looking for before Core Duo always say SLI on the box and in the title on Newegg. I don't see why they wouldn't list it as that is a plus.
Uhm, look it up on the manufacturer's website?