NGFF vs NVMe: Stop Confusing These Two (Here’s the Truth)

Published on April 23, 2025

Updated on April 4, 2026

Confused between NGFF and NVMe?

You’re not alone, and choosing the wrong one can lead to buying the wrong SSD.

Many people think NGFF and NVMe are the same thing or competing technologies, but that’s not actually true.

This confusion has caused countless users to pick incompatible or underperforming storage solutions for their PCs without realizing it.

In this guide, you’ll learn the real difference between NGFF and NVMe, how they work, and which one you should choose for your PC.

What is NGFF (M.2)?

NGFF, or Next Generation Form Factor, is the previous name for what is known now as the M.2 interface. NGFF refers to the form factor, the physical shape, and the size of the SSD storage device, and not the technology.

M.2 has a more flexible physical specification than most 2.5-inch SSDs that use the traditional Serial ATA interface to connect to the computer.

Such SSDs had a vast form factor (2.5-inch) and took up a lot of space, especially in old laptops. M.2 SSDs connect to the motherboard and use the same SATA interface (Serial ATA 3.0) as the 2.5-inch SSDs, but take up a little less space compared to 2.5-inch SSDs.

M.2 SSDs come in a variety of lengths. They all have the same width, which is 22 mm or 2.2 cm, but differ in height depending on the model.

Some M.2 SSDs are as short as 30 mm in height, while others can be as long as 110 mm, which is 11 cm. The most well-known M.2 SSD is the M.2 2280 model, which comes in 22 mm wide and 80 mm tall.

One of the most important things to know about the M.2 SSD (NGFF) is that it can support two different interfaces with different speeds:

• SATA (same speed as traditional 2.5″ SSDs, up to 550 MB/s)
• PCIe (whether it’s PCIe 3.0 4x or PCIe 4.0 4x, the M.2 uses the NVMe protocol for faster reading/writing speeds that go up to 10,000 MB/s)

What is NVMe?

NVMe, or Non-Volatile Memory Express, is a communication protocol developed for modern SSDs. It leverages PCIe lanes and communicates directly with the CPU, resulting in faster read and write speeds. You can read in-depth articles about NVMe technology on the official NVMe website.

Before NVMe technology was developed, most SSDs in the market were forced to use previous protocols (like AHCI) originally built for slow hard drives, which created a performance bottleneck, which was a huge problem back then.

NVMe was optimized for SSDs. NVMe was created to unlock the full potential of SSDs to be able to reach mind-blowing reading/writing speeds and be compatible with every system in the market. 

NVMe is roughly ~850% faster than AHCI, which is the protocol used for HDDs with spinning disk technology.

NVMe has a lower latency, and also input/output operations per second (IOPS) that exceed 1 million operations compared to the old AHCI technology.

To give you a small picture of the speed of the NVMe technology, Windows 11 can boot in as little as 5 seconds when installed on an NVMe SSD.

I highly suggest getting an NVMe SSD and installing any operating system on it.

NGFF vs NVMe: What’s the Real Difference?

NGFF (also known as M.2) refers to the physical form factor of an SSD, while NVMe refers to the data transfer protocol that determines how fast the drive can communicate with your system.

In simple terms, NGFF is about how the SSD looks and connects, while NVMe is about how fast it performs.

This is why NGFF and NVMe are not competing technologies; they serve completely different roles.

Here’s a quick comparison to make the difference clear:

How to Tell the Difference Between M.2 NGFF vs NVMe?

Look at the Connector

The most straightforward way to tell the difference between M.2 SATA and M.2 NVMe is by looking at its connectors. M.2 SATA always comes with two-notch keys (called B key and M key). M.2 NVMe always comes with a notch key (M key only).

To make it simple:

• If you see two notches, it’s likely SATA.
• If you see one notch, it’s likely NVMe.

Read the Product Package Specs

The second way to tell the difference is to read the product package specs:

• M.2 SATA SSDs mention SATA III technology (6 Gbps).
• M.2 NVMe SSDs mention PCIe Gen 3 x4, Gen 4 x4, or simply NVMe technology.

Reading/Writing Performance Speed

The third simple way to tell the difference between an M.2 SATA SSD and an M.2 NVMe SSD is to look for the reading/writing performance speeds specified in the product package.

To be straightforward:

• SATA SSDs reach speeds of around 500–600 MB/s as they use SATA III.
• NVMe SSDs easily reach 3000–10,000 MB/s, depending on the generation of the NVMe and the generation of the PCIe on your motherboard.

To benefit from the speeds mentioned in the product package of the NVMe SSD, your motherboard’s NVMe PCIe should be compatible with the NVMe you just bought. So, in other words, if you have PCIe Gen 4 x4 in your motherboard, you should get a Gen 4 NVMe SSD; Gen 3 NVMe SSDs will work on PCIe Gen 3 x4, but at lower speeds.

Use Cases & Which One to Choose?

M.2 SATA SSD

M.2 SATA SSDs are the best option for individuals who don’t need extreme speeds; these SSDs are great for everyday tasks like web browsing, office work, and media consumption.

They are better than the previous hard disk drives. M.2 SATA SSDs are budget-friendly upgrades for either your older laptop or desktop, making it boot and respond faster than ever before.

M.2 NVMe SSD

M.2 NVMe SSDs are the way to go if you need the best performance from your PC and you want to future-proof it. Such SSDs are perfect for tasks such as gaming, video editing, and 3D rendering.

NVMe is the best data transfer protocol to date. If you are on a budget, you can buy a 256 GB NVMe SSD and make it solely for the OS, you can get one for around ~$30 – $35 bucks, depending on your region. Most mATX or ATX motherboards nowadays support at least 1 M.2 NVMe SSD PCIe port (B450M, B450, B550M, B550, B650M, B650 For AMD) (B610M, B660M, B660, B760M, B760 For Intel). If you want to know the difference between mATX and ATX motherboards, you can read our article here.

Common Misconceptions

M.2 Means NVMe

People often assume that if an SSD is in fact an M.2, it automatically uses the NVMe protocol. As we discussed, M.2 is a form factor and can use either SATA or NVMe protocols, depending on what you have and bought.

NVMe and PCIe Are the Same

Some people think NVMe and PCIe are the same thing, but in reality, PCIe (Peripheral Component Interconnect Express) is a physical interface used by M.2 NVMe SSDs, while NVMe (Non-Volatile Memory Express) is a protocol used by modern SSDs. In fact, NVMe uses PCIe, but they are not the same thing.

You Need an Expensive Motherboard for NVMe

Many users believe you need a high-end motherboard to use NVMe SSDs, but that’s a wrong idea. In fact, older motherboards don’t support M.2 NVMe SSDs and are solely developed with SATA SSDs in mind.

Most mid-range motherboards now include M.2 slots that support NVMe. Before buying an NVMe SSD, you just need to be sure that your motherboard supports either PCIe Gen 3.0 or Gen 4.0.

All M.2 Drives Are Fast

There’s a belief among PC users that indicates that all M.2 SSDs in the market offer fast performance. In fact, the technology being used by the M.2 SSD makes a huge difference. M.2 SATA SSDs are much slower than M.2 NVMe SSDs. M.2 SATA is limited by the SATA interface protocol, offering speeds up to 600 MB/s, whereas M.2 NVMe SSDs can provide speeds that go from ~3000 MB/s to 10,000 MB/s (depending on the version of PCIe).

Conclusion

M.2 SATA is, in fact, a cost-effective option for everyday use. This specific solution will make your PC’s performance a lot faster, better, and more reliable.

M.2 NVMe, on the other hand, will benefit you if you are working with huge project files, playing modern AAA video games, and doing a very powerful workload on your PC.