Ah, you are right. It was ages since I last used CPU-Z.
It appears my 1037U is jumping between 798.1Mhz / 0.768V (x8) on idle and 1795.71Mhz/ 0.792V (x18), with a bit weird bus speed of 99.76Mhz. There are some intermediate power states as well, 9x, 11x, 13x, 15x and 17x I saw, but the CPU...