The important part.
but the rights and licenses granted to the non-terminated Licensed Party(ies) (including without limitation the Terminating Party and all of its non-terminated Subsidiaries) shall survive such termination of this Agreement subject to the non-terminated Licensed Party’s(ies’ continued compliance with the terms and conditions of this Agreement
So yes, Intel will keep all the rights to x64 and what else if someone buys AMD. While AMD loses all theirs.
At the start of that is " In the event of any termination of this Agreement
pursuant to Section 5.2(a)"
That's only for 5.2 (a) Termination by Notice for Breach.
Note:
5.2 (c) Termination Upon Change of Control. Subject to the terms of, and as further set forth in, Sections 5.2(d) and 5.2(e), this Agreement shall automatically terminate as a whole upon the consummation of a Change of Control of either Party.
5.2 (d)
(ii) In the event of any termination of this Agreement
pursuant to Section 5.2(c), and subject to the provisions of Section 5.2(e), the rights and licenses granted to both Parties under this Agreement, including without limitation the rights granted under Section 3.8(d), shall terminate as of the effective date of such termination.
5.2 (e) covers bankruptcy
Less legalese:
If either AMD or Intel stops following the agreement and fails to correct itself within 60 days then the agreement ends for them but not for the one still complying as long as they continue to follow the agreement.
If either AMD or Intel experiences a change of control that doesn't result from bankruptcy then the agreement ends for both.