Historically most successful AMD designs came from the outside. 286 was Intel clone, Am386 Intel microcode copy. Am486 lagged by one year, offered lower performance and was still developed using Intel IP. K5 first 100% AMD design, slow and late, competed in the bottom low end, considered a failure. K6 100% external design by NexGen, let AMD move up to middle of the market. K7 designed by DEC Alpha team and manufactured in Motorola partnership, great success.