Just wondering if someone could help me. I recently bought an AMD k6-2 550 to replace my existing 450. I figured for $32, it was a cheap way to upgrade a little. Unfortunately, when I removed my 450 and put in the 550, I started up the computer and ran wintune diagnostic program and it still says that I am running a 450. Addtionally, there was no performance increase what so ever. Did I get sold a processor that says 550, but is actually a 450. I just got the processor three days ago and I have twelve days to return it if I'm not happy. Any help or suggestions would be greatly appreciated. Thanks in advance.