The Mediatek Genio 1200 has four A55 cores and four A78 cores in what Arm calls the DynamIQ Shared Unit (DSU). The Genio 1200 runs its A55 cores at 2 GHz, and gives each A55 core 128 KB of L2 cache. Zarif98 on Reddit kindly donated a OnePlus 7 Pro, and that comes with four A55 cores in the Snapdragon 855. Arm’s Technical Reference Manual states that the instruction cache has a “128-bit read interface to the L2 memory system”. PerformanceThe A55 cores on Mediatek’s Genio 1200 deliver performance improvements well above Arm’s reference figures across many of Geekbench 6’s workloads.