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! Thank you for stopping by. Have a great day!