AMD only provides a warranty on its line of boxed processors.

If I have a non-boxed product, who do I contact to determine if my problem is covered by the warranty?

Contact the company from which you originally bought your computer system or contact the system manufacturer. If your system was built by an OEM, please address your issue directly to that OEM for resolution. You can also consult the warranty documentation that accompanied your computer system for specific warranty terms and conditions. DO NOT contact AMD.

The reseller from which I bought a system that contains an AMD processor informs me that my warranty has expired. Does AMD provide a warranty extension period for the processor?

No. AMD DOES NOT cover products purchased from reseller and DOES NOT provide any extensions to the warranty period as outlined in the documentation which came with your computer system.