Not quite what happened, Intel got stuck itself in several anti-trust quagmires because of their attempts to rescind the x86 license that IBM forced Intel to g

Not quite what happened, Intel got stuck itself in several anti-trust quagmires because of their attempts to rescind the x86 license that IBM forced Intel to give to AMD when the 8088 was selected for the original IBM PC. Intel did everything it could to avoid keeping AMD in the game, including paying Dell off to not use AMD chips. I don't recall ever hearing about Intel investing in AMD, maybe you're thinking of the $1.25 billion settlement Intel had to pay AMD for various lawsuits Intel was in danger of losing and potentially having to pay triple damages.