God, yes I loved the K6III mobile in a desktop motherboard. 600 mhz easy from a 450 mhz marking. And enough L2 and L3 cache to keep up with a early PIII or early slot K7.
I still have one running upstairs at home with Win XP Pro on it. That reminds me I have some ram I can add to it now that I've upgraded dad's system to a Nforce4 SLI setup with DDR.