Apple impressed everyone with the launch of their M1 processor last year and it would appear they are preparing to do it again with an upgraded version named the M1X for the 2021 Mac lineup. The Apple M1X will reportedly include an upgraded 12-core CPU consisting of eight Firestorm performance cores and four Icestorm power-efficiency cores compared to the 8-core 4+4 configuration of the M1. The M1X GPU is rumored to include an even greater upgrade with 16 cores and 256 execution units which is exactly double then found on the M1 CPU. The chip will also include an increased TDP of 35 W – 45 W and will double the maximum RAM configuration to 32 GB. This information is not official so take it with a heavy dose of skepticism, the Apple M1X is expected to be announced by Apple in the coming months and will likely power the 2021 MacBook Pro 14, MacBook Pro 16, and 27″ iMac
Source: CPU Monkey , Techpowerup