The serial number (S/N) is a unique identifier required for all support requests. You can locate it using three primary methods:
AMD provides an internal API for bulk serial number validation, but you need a direct AMD account manager to access it. amd processor serial number lookup tool
AMD will rarely honor a warranty lookup without a valid invoice or receipt from an authorized reseller (Amazon, Newegg, Micro Center, etc.). The serial number (S/N) is a unique identifier
AMD Processor Serial Number Lookup Tool