Computer DIY installed must know: SSD interface

How to DIY a host? It can meet their own work, the game needs, but also a high value, noise, the most important thing is that the price is cheap, better quality.

This series is to let the machine 0 Foundation of the friends can easily understand, so try to avoid professional parameters

At present, the mainstream solid-state hard disk mainly SATA3 interface, a small part of u.2, m.2, PCIE. The same capacity and different interface solid-state hard drive price difference is very large, this is what causes? Please read down.

SATA3

SATA3 full name is "SATARevision3.0", is the Serial ATA International Organization (SATA-IO) in May 2009 issued a new version of the specification, mainly the transmission speed of doubling to 6Gbps, while backward-compatible with the old version of the specification "SATARevision2.6" ( is now commonly known as the sata3gbps), the interface, the data line has not changed. The SATA3.0 interface technical standard was presented by Intel Corporation in the first half of 2007, and Knut Grimsrud, technical director of Intel's Storage Architecture Design division, Knut Grimsrud said the SATA3.0 transmission rate was 6Gbps.

Now seven years later, the speed of solid-state hard disk has changed dramatically, many excellent SSD read and write speed has reached 550mb/s, this is already the limit speed of SATA3 interface, so many manufacturers choose to develop new interface solid-state hard disk.

u.2

The U.2 interface, formerly called SFF-8639, is driven by Intel single-handedly. Essentially SATA Express, and the SATA-E physical interface is transformed via the SATA 6Gbps interface, somewhat similar to the SAS interface. It uses 2 SATA 6Gbps connectors and a mini SATA interface with only 4pin pins. The biggest feature of the M.2 interface is the support of the NVME standard protocol, high speed, low latency, low power, theoretical transmission speed of up to 32Gbps, and SATA only 6Gbps, more than SATA 5 times times faster.

M.2 interface

The M.2 interface is also the new interface specification introduced by Intel. That's what we used to refer to NGFF, next Generation Form Factor. There are two types of m.2 interfaces: Socket 2 and Socket 3, where Socket2 supports SATA, pci-e X2 interfaces, and if the Pci-ex2 interface standard is used, the maximum read speed can be 700mb/s, and writes can reach 550mb/s. And the socket 3 can support the Pci-ex4 interface, the theoretical bandwidth can reach 4gb/s.

M.2 Solid state HDD Advantage wins in small size, suitable for super users to use.

PCIe interface

PCI-E is the latest bus and interface standards, formerly known as "3GIO", is proposed by Intel, in terms of transmission efficiency, onboard PCI-E than SATA more suitable for CPU, memory data for communication and delivery. The Pci-e interface's SSD is accessed directly through the PCI bus, rather than simply encapsulating the flash or DRAM memory into a SCSI attached hard drive. So from the I/O delay point of view, this is essentially a change, directly to the SSD's random read and write performance to obtain a magnitude of ascension. It can also be said that the PCIe interface solid-state drive is currently the most expensive solid-state drives, but also the strongest performance.

Recommendation: For most users, the SATA3 interface is sufficient. High-end game enthusiasts can choose u.2 PCIe solid-state drives, while notebook users are naturally selected m.2 solid-state drives are the most appropriate.