Which types of SSD interfaces are available
Summary: There are many types of interface types for SSDs nowadays, and the common ones are SATA interface, PCI-E interface, M.2 interface, in addition to that, there are also MSATA, SATA-express, SAS, U.2 and other interface types for SSDs. In the face of so many SSD interface types, how to choose the right SSD interface? Below with the editor to understand it. First, which kinds of SSD interfaces
At present, in the field of SSDs, the different interfaces that can be seen are mainly SATA, mSATA, M.2, SATAExpress, PCI-E and U.2, etc., which are introduced by the following Xiaobian one by one.
(A) SATA, M.2 and other mainstream interfaces
1, SATA6Gbps interface
“SATA6Gbps” is actually one of the parameter standards of SATARevision3.0, which is mainly used to express the use of the SATARevision3.0 standard, relative to SATARevision2.0, faster speeds. SATA is the standard specification for hard disk interfaces, in fact, the SATA6Gbps interface this statement is not standardized, the exact name is SATAIII, the interface speed is 6Gbps only, just now we are accustomed to this statement.
The SATA 6Gbps interface is the most common HDD/SSD hard drive interface, and most people buy hard drives with this interface now.
As the most commonly used hard drive interface, the SATA6Gbps interface is the most mature. 6Gbps bandwidth is much lower than the 10Gbps or even 32Gbps bandwidth of the newer interfaces, and mainstream SSDs still continue to use them, and with the gradual increase in performance of SSDs, the standards have become a major bottleneck in restricting the use of SSDs.
2. mSATA interface
The full name of the MSATA interface is MINI-SATA, and as the name implies, it’s a miniature version of the SATA interface. This type of interface is designed to be used in ultrabooks, business books, and other laptops that seek to miniaturize the SSD, but have the same speed and reliability as the SATA interface standard.
In fact, the msata interface is an important part of the miniaturization process for SSDs, but mSATA still hasn’t gotten rid of some of the shortcomings of the SATA interface, such as still being a SATA channel, and speeds are still at 6 Gbps. mSATA is now facing obsolescence, and will be replaced by M.2 SSDs, which have much more upgradability potential.
3, M.2 interface
M.2 was originally called the NGFF interface, both in terms of specification size and transmission performance are far better than mSATA, it is the beginning of the use of PCI-E2.0x2 channel, the theoretical bandwidth of 10Gbps, and now the full shift to PCI-E3.0x4 channel, the theoretical bandwidth of 32Gbps, compared with the past. The level has increased a lot, but also allows the SSD performance to increase significantly. As a result, it has been said that this is a new generation of interface standards tailored for ultrabooks, with a very wide range of applications.
(2) PCI-E, SATAExpress and other non-mainstream interfaces
1, PCI-E interface
This interface can directly connect data to the CPU through the bus, eliminating the process of memory calling the hard disk, so that the transmission efficiency and speed are multiplied, so the PCI-E interface data transfer speed is theoretically stronger than the M.2 interface. Therefore, PCI-E interface data transfer speed is theoretically stronger than M.2 interface, but the price will be more expensive. The PCI-E interface also has the disadvantage that it can only be used in desktop computers, which makes its adaptability and popularity greatly reduced. PCI-E hard disk was initially used in the enterprise market, because it requires a different master control, high performance at the same time the cost is also high, the consumer market does not have a lot of demand, but only the past two years in the rise of the PCI-E hard disk in the high-end consumer-grade market.
2, SATAExpress interface
After the 6Gbps speed, SATA interface to continue to increase the speed has been difficult, SAS interface can be raised to 12Gbps interface, but that is for the enterprise market, the original interface to do a lot of changes, and the latter is not sensitive to the cost of the consumer market, but not the same, to be SATA-IO’s solution to this problem is the SATAExpress interface.
The physical interface for SATAE was actually adapted from the SATA6Gbps interface, which was introduced a few years ago, but as things stand now the road to SATAE’s popularity is still very far, and the only sensible thing to do is to make it backward compatible with the SATA6Gbps interface.
3, U.2 interface
U.2, also known as SFF-8639, is the interface specification introduced by the SSD Form Factor Work Group (SSDFormFactorWorkGroup). U.2 not only supports the SATA-Express specification, but also compatible with SAS, SATA and other specifications. So you can simply think of the U.2 interface as a quad-channel version of the SATA-Express interface, with a theoretical bandwidth of up to 32Gbps, which is no different than the M.2 interface.
Two, SSD interface how to choose
SSD solid state drive commonly used interface SATA, M.2, PCI-E three, the following talk to you how to choose the right SSD.
The SATA interface is the most common interface for SSDs, and basically all motherboards have this interface, which is common to mechanical hard disks.The version of the SATA interface has evolved from the early SATA 1.0 to the current SATA 3.0, which is a mature interface technology with good compatibility, and the transfer speed can reach 600MB/S, which is able to satisfy the performance needs of low-end SSDs. SATA3.0 Therefore, the SATA interface SSD is the first choice for old computers to upgrade their hard disk, plus the cost-effective SSD with this interface, some low-end new computers are also recommended to buy this interface SSD.
The second is the currently popular M.2 interface. In recent years, the new motherboards generally have this kind of interface, some high-end motherboards will even have two M.2 interface, enough to meet the needs of users. M.2 interface is also divided into AHCI protocol and NVMe protocol two kinds of AHCI protocol is designed for the SATA interface, the speed has been unable to meet the needs of the SSD, the new NVMe protocol is faster, lower energy consumption, is the future of the mainstream! The new NVMe protocol is faster, less energy intensive, and is the future dominant protocol. We recommend that new installers try to adopt the NVMe protocol.
The PCI-E interface is the most expensive and powerful SSD, but it requires a PCI-E slot on the motherboard, so if you only have a PCI-E slot and need a discrete graphics card, you’ll have to give up on this interface, but it’s worth it for those who are looking for the ultimate in performance.
What is the interface of SSD solid state drive?
The types of interfaces for SSD solid state drives are SATA, mSATA, M.2, SATAExpress, PCI-E and U.2.
SSD SSDs are also available for desktop computers.
The vast majority of desktop computers and mainstream laptops use the SATA interface directly, which is compatible with traditional mechanical hard drives and SSDs, and the interface will also be mainstream for a long time to come. For some high-end gamers, you can consider using an M.2 interface SSD, but only if your motherboard supports it.
Solid-state drive protocol speed comparison of different interfaces
How many SSD interfaces are there
There are five.
The M.2 interface is a new host interface program that is compatible with a variety of communication protocols, such as sata, PCIe, USB, HSIC, UART, SMBus, and so on.
For desktop users, the SATA interface is already sufficient to meet the needs of most users, but taking into account the storage needs of Ultrabook users, Intel has eagerly introduced this new interface standard. So, we have seen this new M.2 interface on the new 9 series motherboards released by Asus, Gigabyte, MSI and others, which are now popularized.
The M2 interface transfers more than SATA3:
SATA3 is 6Gb/s, which is equivalent to is 750MB/s transfer rate.
M2 is 10Gb/s, which is equivalent to 1.25GB/s transfer rate.
Higher-spec enterprise SSDs are faster with the M2 interface, while regular home SSDs are still faster with SATA 3.0 because of the low material.
SSD Interface Types and Differences
The SSD interface types are SATA, SATAExpress, mSATA, PCI-E, M.2, U.2, of which M.2 is compatible with PCI-E and SATA.
The main difference is that the transmission speed is different, the scope of use is different, in the transmission speed of U.2 is the fastest, SATA, as well as Msata is the slowest, the scope of use of SATA is usually used in the old desktop, while the M.2 is very common in the ultrabook and desktop. Specifically as follows:
1, SATA: Its transmission speed is 6Gbps, often used in older desktop computers, is relatively early and old a kind of interface.
2. mSATA: Slightly more advanced than the one above, its transfer speed is also 6Gbps, and is more commonly used in small laptops, business books, and desktops.
3, SATAExpress: its transfer speed is twice as fast as the previous one, and can reach 12Gbps, but in the actual use of the process, this interface of the SSD is actually very few.
4, PCI-E: this interface is divided into two versions, one is PCI-E2.0, which has a transfer speed of 10Gbps; the other is PCI-E3.0, which has a transfer speed of 32Gbps, and is used in desktops and notebooks.
5, m.2: it has the most compatibility, both compatible with the interface of the PCI-e, but also compatible with the interface of the SATA, the speed is also two kinds of 10Gbps and 32Gbps, the use of one of the most widely used one of the SSD.
6, u.2: it is the fastest transmission speed in the SSD, up to 32Gbps, but also now more advanced a solid state drive, desktop or laptop will use it.
SSD several interfaces
1, STAT interface, the transfer speed is 6Gbps, used for older desktop machines.
2, mSATA interface, the transfer speed is 6Gbps.
3, SATAExpress interface, the transfer speed can be up to 12Gbps.
4, PCI-E interface, the transfer speed is up to 32Gbps.
5, m.2 interface, the speed is 10Gbps and 32Gbps.<
6, u.2 interface, is the fastest transfer speed in SSDs, reaching 32Gbps.