> What am I missing/misunderstanding here Some (not all) GPU memory types are not cache coherent with the CPU. Some of the cache-coherent cases have poorer pe

> What am I missing/misunderstanding here Some (not all) GPU memory types are not cache coherent with the CPU. Some of the cache-coherent cases have poorer performance relative to the non-coherent memory from the perspective of the GPU's memory bandwidth and access latency.