If by "conspiracy" you mean "business deals where Intel uses their financial clout to compel companies to not provide AMD options", then yes, that is definitely provably happening.

I can't use google fu to find it now, but I swear I read something about this in the last 6 months or so. The best I have is from 2007: https://fortune.com/2007/02/15/suit-intel-paid-dell-up-to-1-...