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Samsung SM951-NVMe Versus AHCI Versus SATA 850 Pro

80% Read Random Mixed Workload

Conversely, with random mixed read and write data, the SM951-NVMe scales better with queue depth than the AHCI model. At low queue depths, the performance difference is much more subtle. You wouldn't notice it under real-world conditions.

Chris Ramseyer is a Contributing Editor for Tom's Hardware US. He tests and reviews consumer storage.