A benchmark preview of the Intel Core i9-12900K has been accidentally posted online, and it shows the 12th Gen Alder Lake hybrid chip offering a seesaw-like performance against the Rocket Lake i9-11900K. While the engineering sample does show promise even without the AVX-512 instruction set, it could not shine against the AMD Ryzen 9 5900X Zen 3 part.
https://www.notebookcheck.net/Seesawing-Intel-Core-i9-12900K-sample-with-disabled-AVX-512-teeters-against-the-i9-11900K-in-preview-benchmarks-and-fails-to-overwhelm-the-AMD-Ryzen-9-5900X.566088.0.html
What's with dropping the AVX-512?
It would be really funny if AMD added AVX-512 to Raphael and beat Intel on its previously easy AVX-512 benchmark wins. I'm not sure if they will though.
Intel could be introducing SPR HEDT chips. The Golden Cove cores used in the Xeons have dual avx512 and the new amx tiled matrix operations. See the wccftech article, "Intel Sapphire Rapids HEDT CPU & W790 Chipset Lineup Allegedly Planned For Q2 2022".
It looks like Intel could be doubling up choices to provide answers to the higher core count server and desktop challenges of Apple and AMD.