With the advent of the 9th generation of Core processors from Intel, we see the market return to what we have been used to in the past.  Intel's offering is now faster and more effective than AMD's Ryzen, but it is also significantly more expensive.  Instead of getting an APU and heatsink for ~$300, you will be paying ~$530 for just the processor with no cooler.  That said the i9-9900K makes sense for those who have spent the money on an RTX 2080 Ti and a high resolution monitor, since they've already set a large budget; while those with less lofty dreams will be very happy with the Ryzen 7 2700X.

The question of overclocking is an interesting one, as Ken had no luck getting the chip to run above 5GHz.   [H]ard|OCP had a slightly better experience, hitting 5.14GHz with a 3600MHz memory bus, which could not match the content creation power of Threadripper 2 even though it was sucking down more juice.  Check out their review and then browse through the ones below.

"The new 9th generation Intel i9-9900K CPU is upon us! AMD has been pushing into Intel's desktop market and Intel knows it. Today Intel is pulling the curtain back on "not paid for" reviews and we are happy to be serving you one of those up here today. Is the i9-9900K better than the Ryzen 7 2700X, and is it worth the staggering price premium?"

Here are some more Processor articles from around the web:

Processors