Why? I do not understand. It would make sense if the Atoms were performance per watt champions but https://www.cpubenchmark.net/power_performance.html#intel-cpu

Why? I do not understand. It would make sense if the Atoms were performance per watt champions but https://www.cpubenchmark.net/power_performance.html#intel-cpu https://www.cpubenchmark.net/power_performance.html#intel-cp... in this chart you basically only see various generations of ultra low (Y) and some low (U) Core chips, going back to Broadwell when the Y chips were introduced. Atoms make a very rare appearance. The top performing Sunny Cove (which itself has much poorer score than the latest Amber Lake Y but I digress) brings in 623 CPU Mark / Max TDP where the top performing Atom, a Pentium Silver N5000 features 455. You can argue on the finer details of this particular benchmark but we are talking of an absolutely brutal 40% difference. Core CPUs switch P states extraordinaly quick so if less performance is needed, they will consume less power just fine. What's the point...? Cheat sheet to reading Intel CPU codes: if the number starts with 10 and contains a G it's an Ice Lake. Otherwise, if there is an Y somewhere, it's ultra low power. The last U letter means 15W, rarely 28W. Last letter T means a 35W desktop chip. E means embedded. Letter H means 45W mobile. All of these were Core chips, first letter N, J, Z means Atom. First digit (or two digits for 10) is generation which became an absolute mess past 7th gen, most important change is that 8-U is quad core where 7-U was dual core.