***M.2 (B Key (SATA) vs M Key (NVME) vs B+M Key (mostly is SATA seldom NVME)

 ***M.2 (B Key (SATA) vs M Key (NVME) vs B+M Key (mostly is SATA seldom NVME) 

https://www.qilingtech.com/articles/how-to-set-nvme-as-boot-drive.shtml

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You said:

m.2 ssd if with b+m key  is nvme? 

ChatGPT said:

ChatGPT

An M.2 SSD with a B+M key can be NVMe, but it is not necessarily always NVMe. The B+M key refers to the physical connector and not the protocol, so the key type tells you which types of interfaces the SSD can work with but not the specific data transfer protocol it uses.

B+M key: This key allows the SSD to work with both SATA and NVMe protocols. The key itself is a physical notch in the connector that allows for compatibility with different types of M.2 slots, including those that support either SATA or PCIe (which is used by NVMe).

B key: Can support PCIe x2 lanes (in addition to SATA).

M key: Can support PCIe x4 lanes (and is usually used for NVMe).

Key Takeaways:

If it's an M.2 drive with a B+M key, it could be either:

SATA-based (older SSDs), which typically use the SATA interface and not NVMe.

NVMe-based (faster SSDs), which use the PCIe interface with NVMe protocol.

Check the specifications of the specific SSD you're looking at to confirm whether it uses NVMe (PCIe) or SATA. It might be labeled explicitly as an NVMe drive, or you can check the data transfer rates: NVMe drives typically offer much faster speeds compared to SATA-based SSDs.

In short: An M.2 SSD with a B+M key can support NVMe, but you would need to verify the actual protocol used by the drive.

You said:

m.2 m key is sata or nvme?

ChatGPT said:

ChatGPT

An M.2 M key is most commonly associated with NVMe (Non-Volatile Memory Express) over PCIe (Peripheral Component Interconnect Express), not SATA.

Key Details:

M Key:

Supports PCIe x4 lanes, allowing for high-speed data transfer. This is typically used by NVMe SSDs.

NVMe uses the PCIe interface, which provides much faster speeds compared to the SATA interface.

SATA-based M.2 SSDs typically use a B key or a B+M key (which supports up to two PCIe lanes but not four). These are slower compared to NVMe drives.

Summary:

M key is primarily for NVMe SSDs and utilizes PCIe x4 lanes.

SATA SSDs typically use a B key or B+M key, not the M key.

So, an M.2 drive with an M key is most likely NVMe. To confirm, check the drive's specifications, as the manufacturer will usually state whether it is using the NVMe protocol over PCIe.