Intel 750 Series 400GB Versus Samsung SM951 512GB
We're pitting Intel's 400GB SSD 750 against Samsung's 512GB SM951 because they're the fastest PCIe-based drives in their respective categories today.
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Random Write



The Intel SSD 750 shows a clear lead in 4KB random write performance. This is an interesting area to talk about. The industry standard is to measure in IOPS. However, there isn't an application that requests more than a few hundred operations. When a product can deliver this many IOPS, it's difficult to even get past QD1 without several applications working simultaneously, updating small bits of information. IOPS gives us an easy way to show performance, but what we really care about is latency. Intel's SSD 750 gives us more headroom for completing each operation in less time, which means less latency between one write and the next.
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Chris Ramseyer was a senior contributing editor for Tom's Hardware. He tested and reviewed consumer storage.