A TPM (v1.2) The BIOS feature is often called something like “embedded security device”
When purchasing a new machine, do not take it for granted that any newer Intel or AMD processor will have the necessary capabilities.
Check Intel processor capabilities: http://ark.intel.com/
Check AMD processor capabilities: http://www.amd.com/us/products/pages/processors.aspx. Look for AMD Virtualization (AMD-V) Technology With Rapid Virtualization Indexing capability for the desired CPU model.