The expected Apple M1X SoC has been broken down into four potential variants for the upcoming MacBook Pro 14, MacBook Pro 16, and Mac mini. The system on a chip's configurations are decided by the amount of unified memory and the GPU core count. It has been rumored that the M1X will have a 10-core CPU part.
https://www.notebookcheck.net/Apple-M1X-SoC-broken-down-into-four-potential-variants-for-the-MacBook-Pro-14-MacBook-Pro-16-and-Mac-mini.557250.0.html