Non-Volatile Memory Express, or NVMe, is an interface specification specifically designed for attaching solid state storage media – like NAND flash – to computers via PCI Express. Part of the reason NVMe came to be is because solid state drives quickly began to bump into limitations of the legacy, and ubiquitous SATA interface.  In real world situations, for example, the SATA interface tops out at roughly 550MB/s, which many entry level solid state drives can now achieve with sequential reads. NVMe is not bound by that limitation, and the spec incorporates many other things, like a higher max queue depth, to squeeze much more performance form solid state storage media.

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