Early benchmarks of the upcoming Intel 12th gen Alder Lake Core i9-12900K in combination with AMD's just announced Radeon RX 6600 GPU were posted on Chinese social media. The results show good gains for the Core i9-12900K compared to the Ryzen 9 5900X, Ryzen 9 5950X, and the Core i9-11900K in 3DMark CPU tests. However, real-world gaming benchmarks do not seem to show very high differences, especially when paired with DDR4 RAM.
https://www.notebookcheck.net/Intel-Alder-Lake-Core-i9-12900K-shown-to-be-56-faster-than-AMD-Ryzen-9-5900X-in-Time-Spy-CPU-but-gaming-advantages-over-Ryzen-9-5950X-seem-miniscule-with-Radeon-RX-6600-and-DDR4-RAM.572802.0.html
There is currently no way to do a fair comparison. Since Alder lake is not 100% on windows 10 and Ryzen loses performance in windows 11. Wait like 5-6 months and see which is best.
Well, with an RX 6600 it's no surprise that there's no big difference in gaming performance. The tests seem to be GPU bottlenecked
It seems like this is might be related to DDR5 latency issues.