"While Apple's larger cores are more power-hungry, they're still a lot more energy-efficient." Pre-release benchmarks using Geekbench pointed to a general 21% CPU gain in the A15 over the A14.

Apple might use the high-end version of its chip with a better GPU and 6GB of RAM and call it A15X, just like it did with the A12Z chip in the 2020 iPad Pro.

The A14 Bionic typically peaks at around 120 frames per second in the same benchmark. So that's around a 65 percent jump in graphics performance, in this particular benchmark.