Sata 2 vs Sata 3 Explaining the Difference

Hello everyone, Today I try to explain the difference between hard drives and 2.5-inch SSD, NVMe and M.2 SATA and mSATA. The difference between these drives is in the different types of connections to laptop or PC motherboards. If you compare the 2.5-inch hard drive and SSD to the same 2.5-inch form factor, you will see that the connection interface is the same SATA type.

That is, if you want to replace your old hard drive with a faster SSD drive, there will be no problem because the SATA interface is compatible with another type of connection - SATA 1, SATA 2, or SATA 3. But unfortunately, You can. The M.2 SSD is not installed in the socket of the SATA hard drive - it is physically impossible. You can't even install M.2 SSDs in MSATA sockets, these drives, as you can see, also have separate connection pockets.

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With a 2.5-inch form factor with a hard drive and an SSD, everything is fairly simple, and with no problem, you can change mSATA because this type of drive with only one form factor and one type of connection is available. We still have M.2 SSDs with different sizes, different bus types, and different keys, and many of them have confusion - "What kind of M.2 SSD should I buy when I upgrade my computer " Okay. Let's talk about the different sizes of M.2 SSD; Only four of them are 2230, 2242, 2260, and the most popular 2280.

The first two numbers indicate the width of the board; The other two numbers are the length. As a rule, it is indicated how long the M.2 motherboard supports. Now let's turn to the types of M.2 drives. M.2 storage can be in SATA and NVMe variants - so what is the difference between M.2 SATA and M.2 NVMe SATA M.2 SSD and 2.5-inch SSD - it has similar specifications.

The M.2 works on the NVMe PCI-E bus, and these are completely different indicators in speed, which is much higher than on the SATA bus. - To explain very briefly, NVMe is a type of bus that works much faster than a SATA bus, for example, modern motherboards use SATA III with a maximum speed of 600 MB / s. NVMe drives provide write speeds of up to 3500 MB / s. This is 7 times more than SATA!

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Yes, these two boards are very similar in appearance but there is a slight difference in the connection socket. As a rule, an M.2 supports SATA 2 keys "M" + "B". M.2 NVMe drives working on the PCI-E bus will have only one "M" key. What this means, I show with examples. The M2 SATA board with the M + B key can be installed in most slots, while the M2 NVM is physically impossible with the "M" key to install in the "B" slot, therefore note which slot is installed on your computer motherboard. How does it all look in practice?

For example, the Asus Prime Z270P motherboard, has an M.2 socket under the key "M" on the board, which means that you can install the M2 SATA SSD ... as you see, some with connections Also do not interfere. . You can also install M2 NVMe SSDs - the connection also does not interfere. All the same with a laptop.

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Let us show you an Asus X570 laptop. On the motherboard of this laptop, there is a socket for the M.2 SSD, a key under "M", and so you can also connect M.2 SATA and M.2 NVMe. But here the question may arise whether M.2 NVMe will be compatible with your laptop. For example, an Asus X570 laptop auto-detects which type of M.2 SSD is connected, and in most modern laptops, the BIOS detects the auto drive.

Many manufacturers install the motherboard slot for M.2 with the support of the key "M" and bus to choose from - SATA or PCIe. That is, you buy M.2 SATA or M2 NVMe and any drive will work. But there are cases when the motherboard only works on one of the two buses and does not support, for example, the new NVMe standard or the old SATA. To ensure that your motherboard is compatible with SSD M2 drives, I will show an example with one of the motherboards from Asus.

Enter the BIOS, then in the Advanced section and find the "M.2 Configuration" line, then in the drop-down menu you can see that the motherboard supports SATA and PCIe bus, and so M.2 SATA and M.2 NVMe Such a motherboard will work. But it is also worth considering that such a setting may not be in your BIOS, but at the same time, your laptop or PC will detect and work with both M.2 SATA and M.2 NVMe.

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So, before buying M.2 SSD storage, read the specification of your laptop or motherboard first. What to do if you have purchased M.2 SATA but do not check for the presence of an M.2 socket on the motherboard, and your laptop only supports the 2.5 SATA standard. In this case, there is a large choice of different adapters. For all these adapters I leave a link in the description where you can buy them. Such an adapter allows you to connect M.2 SATA and make it a 2.5-inch SSD-Storage.

But if you try to connect an M.2 NVMe drive to such an adapter, you will not succeed because the connector is not compatible. There are also adapters for MSATA storage that make up the 2.5 SATA standard. Even for the 2230 M.2 SATA standard, there is an adapter that converts M.2 SATA to mSATA ... after which you can connect to the adapter and create 2.5 SATA. Yes ... there is a sandwich here but it works.

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