These are used CPUs that have been thoroughly tested and are guaranteed to be fully functional.Buyer should ensure that this CPU is supported by their motherboard AND that they have the most recent version of the BIOS installed BEFORE installing this CPU.  Thermal paste is not included.All electronics are carefully handled in a clean, static-controlled environment and are shipped using anti-static ESD inner packaging.We offer a 30-day Money-back Guarantee! Please contact us directly!