Nah, the K6 was not an AMD design, it was NexGen. (I had a Nx686 motherboard back in the day. I was young and wasted way too much money on exotic parts. I also had an Ark Logic video card about the same time, it might've been the Hercules Stingray Pro but my memory is a bit fuzzy after 25 years.)
The AMD K6 is a superscalar P5 Pentium-class microprocessor, manufactured by AMD, which superseded the K5. The AMD K6 is based on the Nx686 microprocessor that NexGen was designing when it was acquired by AMD. Despite the name implying a design evolving from the K5, it is in fact a totally different design that was created by the NexGen team, including chief processor architect Greg Favor, and adapted after the AMD purchase.
That's interesting, and relevant in that the NexGen team was joined by DEC Alpha people to do the K7, but the K6 is not AMD's first out-of-order speculative execution x86 design, per Wikipedia the K5 was an internal project that "was based upon an internal highly parallel 29k RISC processor architecture with an x86 decoding front-end."
https://en.wikipedia.org/wiki/AMD_K6
The AMD K6 is a superscalar P5 Pentium-class microprocessor, manufactured by AMD, which superseded the K5. The AMD K6 is based on the Nx686 microprocessor that NexGen was designing when it was acquired by AMD. Despite the name implying a design evolving from the K5, it is in fact a totally different design that was created by the NexGen team, including chief processor architect Greg Favor, and adapted after the AMD purchase.