The K6-2 was a trooper.
I had one of those for what seemed like an eternity.
At first, right out of the gate: I overclocked it from 300MHz to 350MHz just to see what would happen. It worked perfectly without further adjustment (and the next step did not), so I left it right there at 350MHz. For the price, at that time, it kept up great compared to what my peers had going on.
As the years ticked by and it was getting long in the tooth, it stayed around -- but it shifted roles.
I think the last thing it was doing for me was running a $25 SoundBlaster Live! 5.1's EMU10k1 DSP chip under Windows, using the kX audio drivers.
kX let a person use that DSP chip for what it was -- an audio-oriented DSP with some audio-centric IO. With kX, a person could drop basic DSP blocks into the GUI and wire them together arbitrarily, and also wire them into the real world.
I used it as a parametric EQ and active crossover for the stereo in my home office -- unless I was also using it as a bass preamp, in a different mode. Low-latency real-time software DSP was mostly a non-starter at that time, but these functions and routings were all done within the EMU10k1 and end-to-end latency was low enough to play a bass guitar through.
Of course: It still required a computer to run it, and I had a new family at that time and things like the electric bill were very important to me. So I underclocked and undervolted the K6-2 for passive cooling, booted Windows from a CompactFlash card (what spinning HDD?), and hacked the power supply fan to just-barely turn and rotate air over the heatsinks.
It went from a relatively high-cost past-performer to a rather silent low-power rig that I'd remote into over the LAN to wiggle DSP settings on that only had one moving part.
Neat chips, the K6-2 and EMU10k1 were.
Fun times.
(And to bring it all back 'round: We'd be in a different place right now if things like the K6-2 had been more popular than they were. I don't know if it'd be better or worse, but it'd sure be different.)