Motherboard, CPU and ram upgrade

I installed a new motherboard, CPU and ram into my computer case. I left the drives there. When finished, Windows 10pro booted up perfectly. On all previous other builds, I've always done a fresh install. My computer at this time is running perfectly, and I've run several stress tests with no problems. Does anyone want to weigh in and tell me whether or not you have to do clean installs when installing the three components that I did?
Processor: Intel(R) Core(TM) i5-9600K CPU @...

Motherboard, CPU and ram upgrade