... 3monthes `warranty through FEIY TESTED WORKING PULLED CPU INTEL P4 531 CPU we also stocking the following :Celeron CPU1 ... 0GHz 1M,800MHz,775pin,90nm)2 P4 (531) (3.0GHz 1M,800MHz,775pin,90nm)3 P4 (540) (3.2GHz 1M ... ,800MHz,775pin,90nm)4 P4 (541) (3.2GHz 1M ... HOT Sell and Original intel Dual Core CPU INTEL P4 531 CPU has good quality,100%tested before delivery ...