Comparison of two different interfaces NGFF SSD

M.2 interface to bypass the new generation DMI bus, via PCIe bus bandwidth wealthy, for SSD breakthrough SATA3.0 create the most important rate-limiting conditions. M.2 interface is also closely related to the giant Intel, because the entire standards are made by Intel, set up, and quickly applied to new products Z97 motherboard.

M.2 formerly known as NGFF interface, it is for the super pole (Ultrabook) tailored to the next generation interface standard to replace the original mini PCIe based mSATA interface improvements came. When it is gone PCIe bus, either a more compact size specifications or higher transmission performance M.2 are far better than mSATA.NGFF interface as the next-generation Intel for Ultrabooks tailored interface standards, its size is only 42mmX22mm, NAND-sided arrangement of particles, then the thickness of 2.75mm, double-sided, then the thickness is 3.85mm, while the current size of the mSATA interface SSD to 51mmX30mm, single thickness reached 4.85mm. NGFF mSATA interface relatively speaking volume is further reduced, saving even more space.

NGFF has two interfaces: Socket 2 and Socket 3, former supports SATA, PCI-E x2 interface SSD, WWAN, and other non-storage devices. Socket 3 support designed specifically for high-performance storage designed to support PCI-E x4 interface, while smaller bandwidth of up to 4GB / s.PCI-E interface based on different bus width vary, including X1, X4, X8 and X16, while the X2 model will be used instead of the internal interface slot mode. PCI-E standard connection from one channel to 32 channel connection, there is a very strong flexibility to meet different system equipment for data transfer bandwidth for different needs. In addition, the shorter PCI-E card can be inserted into longer use PCI-E slot, PCI-E interface also supports hot-swappable, which is no small leap.

Note ~
Motherboard only need to set the PCIE M.2 mode can identify and then install WIN8, look at their own motherboard M.2 interface X2 or X4,X4 generally write speed of over 1000 32G, X2 is generally written 10G speeds over 700, it was ask why the difference so much? Because M6e using pcieX2 interface, and xp941 pcieX4 interface using the interface channels … M6e born crippled. Mac Pro also currently spend 4x only. There are several high-end desktop motherboard, 4X interface speed, other retail did not see.