Well:
On November 12, 2009 AMD and Intel Corporation announced a comprehensive settlement agreement to end all outstanding legal disputes between the companies, including antitrust and patent cross license disputes. In addition to a payment of $1.25B that Intel made to AMD, Intel agreed to abide by an important set of ground rules that continue in effect until November 11, 2019.
Customers and Partners
With respect to customers and partners, Intel must not:*
[...]
Intentionally include design/engineering elements in its products that artificially impair the performance of any AMD microprocessor.
https://www.amd.com/en/corporate/antitrust-rulingI like that 'in effect until November 11, 2019.' part :D
