What Is M.2 SSD? Definition and Types

Larissa updated on Jan 31, 2024 | Home > Knowledge Center


 1. What Is M.2 SSD
 2. Types of M.2 SSD
 3. Pros & Cons of M.2 SSD

What Is M.2 SSD

M.2 SSD is a new type of interface in SSD, but different from the traditional 2.5-inch SSD, M.2 SSD looks like a gum which is usually 22(width) x 80mm(length) in size. 


The M.2SSD is a kind of solid-state drive launched by Intel, which can replace a new interface of mSATA. For the new generation of this M.2 SSD, because its interface uses a SATA interface, it is still quite different, and its vast recognition is also relatively high. It is now widely used in the market for laptops and desktops because of its faster reading speed and larger capacity. 

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Types of M.2 SSD

Most M.2 SSDs are in the form of "22 x 80mm", but there are other sizes. You can tell what size an M.2 SSD is by using the four or five-digit number in its name or on its PCB(printed circuit board). The first two numbers stand for width, while the rest are its length (example: M.2 Type-2280).

Common sizes of M.2 SSD are below:

M.2 Type-2230 (22 x 30mm)

M.2 Type-2242 (22 x 42mm)

M.2 Type-2260 (22 x 60mm )

M.2 Type-2280 (22 x 80mm)

M.2 Type-22110 (22 x 110mm)

different M.2 SSD

Pros & Cons of M.2 SSD

Since we know what M.2 SSD and its different types are, let's look at its advantages and disadvantages. 

The main advantages of M.2 SSD are its smaller size and fast reading speed.

M.2 SSD is smaller than the traditional 2.5-inch SSD. So it's increasingly used by thin gaming laptops as they take up less space. The maximum transmission speed of the mainstream SATA 3.0 channel now is 6Gbps, and its actual rate is up to 560MB/s. The M.2 SSD using the NVMe protocol has a maximum reading speed of 32Gbps, which can reach about 3.5GB/s; this is six times faster than a traditional SATA SSD.

But M.2 SSD also has its shortcomings. 

First, in terms of price, M.2 SSD is indeed higher than HDD. In addition, the cost of SATA SSDs is lower than that of NVMe SSDs with an M.2 interface.

Another disadvantage is that NVMe SSD with M.2 interface is small in size and fast in performance, and most NVMe M.2 SSDs are not equipped with heat dissipation vests, but their heat generation is fast, and heat dissipation is slow, so their temperature is higher, which further affects the performance of SSD.

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Updated by Daisy

Daisy is the Senior editor of the writing team for EaseUS. She has been working at EaseUS for over ten years, starting as a technical writer and moving on to being a team leader of the content group. As a professional author for over ten years, she writes a lot to help people overcome their tech troubles.

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Written by Larissa

Larissa has rich experience in writing technical articles and is now a professional editor at EaseUS. She is good at writing articles about data recovery, disk cloning, disk partitioning, data backup, and other related knowledge. Her detailed and ultimate guides help users find effective solutions to their problems. She is fond of traveling, reading, and riding in her spare time.

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