Question about Intel Core i9-9900K

So if you want a bit more for your money, you could get a current AMD Ryzen, e.g. Ryzen 7 5800X and a B550/X570 board or (AM4 socket).
But then you have to take a closer look at the RAM and choose a kit from AMD or the board manufacturer that has been tested in the Qualified Vendors List (QVL), AMD CPUs are a bit trickier.

Or wait until I sell my 9900K with board here at Digitec ;-) This will be the case when the RTX 30xx or AMD 68xx GPU's are available without a waiting list.

I would be careful with the SSD because it is a system-specific model from/for HP. It could be that there is special firmware on it to prevent cooperation with other devices.

The RAM is not in the Qualified Vendors List (QVL) of the mainboard (see manufacturer mainboard -> model -> support -> CPU/memory support). But it could still work, try & error....

You can't always rely on the reviews and questions at Digitec Galaxus, because they are often combined and then for a completely different part number. Many customers have been asking Digitec to separate this for a long time. Good example, HDMI cable with HDR support, 1, 2 and 3 metres are the same questions/answers/reviews as 5, 10 and 15 metres. These often do very well and customers then rely on them, even though most cables don't run HDR from 5 metres onwards.

I am satisfied with the purchase everything runs like clockwork with all this product. But bizeli expensive!