80% Read Sequential Mixed Workload
The SM951-NVMe delivers higher sequential read performance than the AHCI model at low queue depths when it's only reading data. With mixed reads and writes, the SM951-NVMe maintains a slight lead at QD1, though the gap shrinks. At QD2, performance is nearly identical. Everything above that queue depth favors the AHCI model.
We aren't sure why the NVMe model doesn't show a strong lead in this test, except that perhaps Samsung's SM951 architecture isn't yet fully optimized.