Intel stagnated for several years, allowing AMD and Apple (both using TSMC) to produce CPUs that are simultaneously faster and more power efficient than Intel's

Intel stagnated for several years, allowing AMD and Apple (both using TSMC) to produce CPUs that are simultaneously faster and more power efficient than Intel's. There wasn't really anything Intel could do about the power efficiency in the short run so they went all in on performance and started selling desktop CPUs with a 6 GHz turbo that draw >250 watts. Apparently this is not great for reliability.