Compared to A78, the X1 has twice the SIMD units, 20% wider instruction fetch, 33% wider macro-op fetch/rename, 2x the macro-op cache, 40% larger instruction wi

Compared to A78, the X1 has twice the SIMD units, 20% wider instruction fetch, 33% wider macro-op fetch/rename, 2x the macro-op cache, 40% larger instruction window, 2x the L2, 2x the L3, 2x the L0 BTB entries, and 66% larger L2 BTB capacity. All of that should provide something like 25-30% faster performance than A78. Despite that, the X1 is still projected to be significantly slower than A13 and A14. ARM should be putting their best foot forward instead of this A78 attempt.