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(Non-Volatile Memory Express) A standard hardware interface for solid state drives (SSDs) that uses the PCI Express (PCIe) bus. Introduced in 2011 by the NVM Express group (www.nvmexpress.org), NVMe takes advantage of the parallel I/O of the PCIe bus and the low latency of SSDs. It supports speeds up to six times faster than SATA-based SSDs and 10 times faster than hard drives and is especially noticeable when reading and writing large files. See NVMe over Fabrics.

Via PCIe, M.2 and U.2
Connecting to the computer over PCIe, NVMe SSDs are available in three form factors: a PCI Express card, the small M.2 card and U.2, the latter supporting the traditional 2.5" and 3.5" drive sizes (see U.2). See PCI Express, M.2, SATA and SSD.

Stack Up More Commands
One of the salient features in NVMe compared to SATA is the dramatic increase in the number of commands that can be queued (see NCQ).

NVMe on an M.2 Card
Nearly a terabyte of SSD storage (960GB) is contained on this 80x20mm M.2 card (pen is for size comparison). By 2020, NVMe SSDs reached eight terabytes (8TB). See M.2.

NVMe M.2 on the Motherboard
Modern desktop PC motherboards have dedicated M.2 slots as in this Asus example. This is looking down between the graphics card and heat sink.

SSD Acronyms
NVMe is the controller protocol. PCIe is the pathway, and M.2 is the form factor. See PCI Express and M.2.
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References in periodicals archive ?
Micron 9000 series SSDs leverage 3D NAND and NVMe technology to maximize throughput and reduce latency for faster access to data for enterprises and cloud providers.
DriveScale-compatible CD5 and CM5 Series NVMe SSDs provide a number of key benefits for composable infrastructures.
Tests were run on the exact same hardware configuration with BeeGFS utilising the direct-attached NVMe vs BeeGFS utilising NVMesh logical volumes.
Coupled with SANBlaze Version V8.0 software, SANBlaze offers fully automated NVMe Gen4 testing including power margining and measurement, performance testing, exception testing including PERST, Hot Plug, Surprise and Graceful removal, Link Training (Gen4,3,2, and 1) and Low Power State testing.
As a natural extension to Western Digital's ongoing contributions within the NVMe Consortium, and its long history of making its SMR-based tools available to the open-source community, the company has launched ZonedStorage.io.
The test system was a compact 2U 4-server chassis with a total of 24 NVMe drives, connected via a 100Gbit RDMA network to 8 BeeGFS client compute nodes.
It also has, with two slots available for M.2 Gen 3x4 PCIe SSDs using NVMe technology in RAID 0 and up to 32GB of DDR4 RAM with up to 2TB of HDD storage.
The 2298 V5 supports up to 24 3.5" and 4 2.5" hard drives (up to 4 NVMe SSDs) in a 2U space, offering near 400 TB storage capacity.
A consortium of vendors, including Intel, Samsung, SanDisk, Dell, and Seagate, developed Non-Volatile Memory Express (NVMe) as a communication interface/protocol specifically for solid-state drives (SSDs).The specification defines a register interface, command set, and features for PCI Express (PCIe)-based SSDs to facilitate high performance and interoperability across all conforming NVM subsystems.
Summary: All-flash storage firm Pure Storage has added a new DirectFlash Fabric capability for end-to-end NVMe and NVMe-oF support in Purity …