I guarantee the CPU's to work perfectly since they were pulled from a working PC computers I do not guarantee if you damage it by not installing it correctly. Please make sure that it will be compatible with your motherboard (you need to make sure this is the correct part you need for your motherboard) Please feel free if you like to contact me for any issues, Thank you. The item "Lot of 26 Intel Q6600 Core2 Quad 2.40GHz Processors SLACR Pulled Working" is in sale since Monday, April 16, 2018. This item is in the category "Computers/Tablets & Networking\Computer Components & Parts\CPUs/Processors".The seller is "computercity714" and is located in Santa Ana, California. This item can be shipped to United States.