There are lots of old CPU's here . But how many of them are actually tested? I slotted and tested this CPU personally. In my experience, having a known good part is always nice (and one less thing to worry about) for anybody taking the time to build or repair a system of their own. This is one of many vintage items from a computer store that closed in 2003. Like a time capsule, these parts were carefully stored since then. See my other listings for more things, including many items in their original packaging! Feel free to ask questions thank you for stopping by. Have a great day!