I had a K6-2 (and a K6 and a K6-3). Even a Celeron 300a @ 450 will eat any K6 alive. The .18mu Celerons would win at everything, no contest.
Here's a THG test, shows : K6-3 450Mhz @ 49.8fps, Celeron 400 (Mendocino) @ 52.8fps, Celeron 533 (Coppermine) @ 64fps
http://www.tomshardware.com/20...k_marathon/page23.html
So, basically, the K6 was pretty much crap. Even reading through some of the other benches : 3dmark 2001se, MP3 encoding, RAR Compression, etc, the K6 gets pwned every time by the Coppermine, and almost every time by the 400mhz 66mhz FSB Mendocino Celeron. Pathetic. Luckily for AMD, they released the truly excellent Athlon (and Thunderbird, and XP, and so on) a little while later, redeeming themselves completely. The only people who bought K6s were people who couldn't afford to build a new Intel box (me), or people who just didn't know any better.