AMD Athlon 800
A proper 800MHz part; made in Q3 of the year 2000 and made for socket A. Athlons from early 2000 often use the much bigger slot A connector.
In it's day this 800MHz piece was a normal 'good performer'. Not the fastest part available, but by far not a budget part. Especially compared to the more expensive Pentium III; the socket A motherboards matured, got cheaper and along with an Athlon 'Thunderbird' the Athlon was clearly the better choice.