How much stress do companies give to previous acad scores during IIM placements?

Going through various forums, I find that the reason why IIMs are giving so much importance to previous acads (X, XII and grad marks) is because during placements, the companies are giving high priority to previous acads. In this regard, can any I…

Going through various forums, I find that the reason why IIMs are giving so much importance to previous acads (X, XII and grad marks) is because during placements, the companies are giving high priority to previous acads. In this regard, can any IIM student/alumni please tell me the exact story behind it. Do the high paying investment banks have 80% throughout as the criteria, or do the consultancy companies keep high cut-offs for X/XII marks?

@visionIIM-ACL -- Plz reply.