I dont know much about all of the CEO's of AMD. However the grandparent comment said not to defer to MBA's not that the CEO was an MBA

What i have seen in other companies is that even if the CEO is a subject matter expert, they get to the level of CEO then start deferring business matters to the MBA's who are viewed as subject matter experts of business. This weak leadership and difference to MBA's often leads to extreme short term thinking and lack of vision centered around quarterly probability statements not around core competences or a vision for making the companies product good