Technology & Computing

What is an M Key?

By: Joel CheesmanUpdated: November 04, 2020

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An M. 2 SSD is "keyed" to prevent insertion of a card connector (male) to an incompatible socket (female) on the host. The M. 2 specification identifies 12 key IDs on the module card and socket interface but M. 2 SSDs typically use three common keys: B, M, and B+M.

Also to know is, what is B key and M key?

As the key positions of B and M are slightly different, the M. SSD can only be installed one way. A 'B' keying (pins 12-19) gives PCI Express SSDs up to 2x lanes of bandwidth, while a 'M' keying (pins 59-66) provides PCI Express SSDs with up to 4x lanes of bandwidth.

Subsequently, question is, what is M key m2?

2, formerly known as the Next Generation Form Factor (NGFF), is a specification for internally mounted computer expansion cards and associated connectors. M. 2 replaces the mSATA standard, which uses the PCI Express Mini Card physical card layout and connectors. It is up to the manufacturer of the M.

What is NVMe M Key?

There are different types of M. 2 slots. A “B-Key” enables SATA or PCIe NVMe SSDs using up to 2 PCIe lanes, while an “M-Key” enables NVMe SSDs with the use of up to 4 PCIe lanes.

Are NVMe and M 2 the same?

Enter NVMe. Standing for “Non-Volatile Memory Express,” NVMe is an open standard developed to allow modern SSDs to operate at the read/write speeds their flash memory is capable of. It is also unrelated to the form factor, which is why NVMe drives can come in both M. 2 or PCIe card form factors.

Related

Is SSD faster than m2?

M.2 SATA SSDs have a similar level of performance to mSATA cards, but M.2 PCIe cards notably faster. In addition, SATA SSDs have a maximum speed of 600 MB per second, while M.2 PCIe cards can hit 4 GB per second. PCIe support also allows M.2 cards to take advantage of the NVMe protocol.

Can I plug m 2 into PCIe?

2 PCIe 2280, 2260, 2242): Computers & Accessories but given that, you can absolutely plug an m. 2 card into such an adapter which can plug in to a PCIe x4 slot. It should work at whatever speed your m. 2 supports (PCIe 3.0 or automatic fallback to PCIe 2.0).

What is M 2 used for?

An M. 2 SSD is a solid-state drive (SSD) that conforms to a computer industry specification and is used in internally mounted storage expansion cards of a small form factor. M. 2 SSDs are designed to enable high-performance storage in thin, power-constrained devices, such as ultrabook and tablet computers.

Can you use m 2 as a boot drive?

Yes, as long as your motherboard supports booting from PCIe/NVMe, which it should if it has an NVMe-capable slot. I'm running a 1TB HP EX920 NVMe SSD as the boot drive of my bargain-basement laptop (upgraded immediately from the stock HDD). Now it's MUCH faster than it was, stock.

Is M 2 a PCIe?

Specifically, M. 2 is an interface specification that supports multiple protocols and applications such as Wi-Fi, Universal Serial Bus (USB), PCI Express (PCIe) and SATA (Serial Advanced Technology Attachment). M. 2-compatible products are not limited to solid-state drives either.

Are all M 2 drives the same?

While the M. 2 standard uses the same 22 millimeter-wide slot for all cards, it's not necessarily the exact same slot. Since M. 2 is designed to be used with so many different kinds of devices, it has some frustratingly similar-looking ports.

Can I put m 2 SATA to NVMe?

As people already know they are physically compatible, you can plug an M. 2 SATA (aka M+B key) into an M. 2 NVMe (M key).

Is M 2 an SSD?

An M. 2 SSD is a solid-state drive (SSD) that conforms to a computer industry specification and is used in internally mounted storage expansion cards of a small form factor. M. 2 SSDs are designed to enable high-performance storage in thin, power-constrained devices, such as ultrabook and tablet computers.

What is M 2 2280 form factor?

2 Form Factor and M. 2 is a Form Factor used for expansion cards and connectors that are internally mounted into a computer. The M. 2 connector interfaces with PCI Express 3.0, SATA 3, and USB 3.0 technologies, providing manufacturers the ability to use the M.

Is m 2 faster?

The 2TB model is the best value but the 1TB is also amazing. Adding one of these will blow through through the 600 MB/s limitations of SSD SATA cables. By plugging directly into the motherboard, an NVMe M. 2 drive provides read/write speeds of 3,500 MB/s and faster – which obviously blows away a typical SSD.

How much faster is NVMe than HDD?

For comparison, a 7200 RPM SATA drive manages around 100MB/s depending on age, condition, and level of fragmentation. NVMe drives, on the other hand, provide write speeds as high as 3500MB/s. That's 7x over SATA SSDs and as much as 35x over spinning HDDs!

Is SATA or M 2 better?

2 SATA SSDs have a similar level of performance to mSATA cards, but M. 2 PCIe cards notably faster. In addition, SATA SSDs have a maximum speed of 600 MB per second, while M. 2 PCIe cards can hit 4 GB per second.

Are all M 2 drives NVMe?

However, not all M. 2 slots support NVMe (some only support SATA, some only NVMe, and some either), so even if you have an M. 2 slot you'll need to double-check that yours will allow for an NVMe drive. The primary motherboard I used for these tests has both 6Gbps SATA, as well as an M.

What is the difference between M 2 and M 2 BM?

Currently an M. 2 SSD has either one of three key types: B, M or B+M, while a socket can only have one key. A 'B' keying (pins 12-19) gives PCI Express SSDs up to 2x lanes of bandwidth, while a 'M' keying (pins 59-66) provides PCI Express SSDs with up to 4x lanes of bandwidth.

Is m2 faster than PCIe?

An M. 2 SSD will support either SATA or PCIe, but not both at the same time. The PCIe interface is faster, as the SATA 3.0 spec is limited to ~600MB/s maximum speed, while PCIe Gen 2 x2 lanes is capable of up to 1000MB/s, Gen 2 x4 lanes is capable of up to 2000MB/s, and Gen 3 x4 lanes of up to 4000MB/s.

Which is better SSD or M 2?

M. 2 SATA SSDs have a similar level of performance to mSATA cards, but M. 2 PCIe cards notably faster. In addition, SATA SSDs have a maximum speed of 600 MB per second, while M.