Everything you need to know about M.2 to Mini-PCIe adapter for laptops

With its Next Generation Form Factor (NGFF) and using the PCIe Lanes, you can’t resist that the M.2 is the future. A lot of people don’t actually get familiar with this technology. But when you see the latest hi-tech products with better performance, it really didn’t take that much time to make you the enthusiasm.

Now you can see all the previous mini-PCIe cards are converted to the M.2 interface. As it uses the same PCIe technology, but because of the extra PCIe lanes support the transferring speed can get double in A/E/B Key M.2 Slot and quadruple in M Key M.2 Slot which is important for the latest performance needy devices.

M.2 SSDs are the first one who came out in the market and after that you can see all of the mini-PCIe cards like 3G, CDMA, WWAN, HSPA, GPS, WiMAX, and Bluetooth shifted to the M.2 interface, just to fit in the new slot.

So, most of the new product comes in the M.2 interface (like new Intel Wireless-AC 9260 2230 Wi-Fi + Bluetooth 5 M.2 Card) where those users who have old mini-PCIe Slot in their Laptop feels a bit left out of technology.

As M.2 uses the same interface, that’s where the ‘M.2 to Mini-PCIe Adapter’ came in. With the help of this adapter, you can connect any M.2 card in your old laptop. But, mini-PCIe is mainly the smaller version of PCIe x1 Slot which can only support single PCI Lane and won’t be a problem for Network Cards, but it surely does for the M.2 SSD.

The speed of Mini-PCIe slot of your motherboard is all depend upon which generation of PCI that your laptop is working on. Using the M.2 card over an adapter will only get beneficial when you have a PCIe 3.0 or 2.0 mini-PCIe Slot on your laptop’s motherboard. Or otherwise, it won’t support most of the devices if the Mini-PCIe Slot is from Gen 1.

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And using the M.2 SSD over an adapter can cut half of the bandwidth speed because of a single lane bandwidth, and it possible that the adapter will bottleneck too. In that case, it always better to use a mSATA SSD over the M.2 for Mini-PCIe slot, as it can run on its best with the perfect connection.

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#Understanding the M.2 Slot Keys

M.2 to Mini-PCIe Adapter comes in different types and buying a particular one can also depend upon the type of key your card has. Yes, you’ll need to check out the M.2 Key slot supported by your M.2 Card and then you can the buy the exact same M.2 key adapter for your laptop.

To know about it better, first you’ll need to understand what the M.2 Slot Keys are;

M.2 Key defines by its notch which you can see inside the M.2 Slots. There are 12 different notches and every notch has its own alphabet name (from A to M). But still most of the M.2 Keys is reserved for the future use and now it’s only four which currently being used by SSD, GPS and Network Cards. After checking your card key support, now you can buy the exact same M.2 key adapter for mini-PCIe Slot.


Not a problem with small M.2 cards, but if you wanted to install 2280 full-size M.2 SSD using the adapter. Then it quite possible that you can’t find any space to put the big card in, where on the other hand some old laptops have plenty of space to fit any M.2 card as you can see in the picture;

These types of adapter mainly don’t need any drive support but the card you installed on adapter will (not SSD but all the other cards). So, make sure you downloaded the drivers first (who is compatible with your OS) before putting your money into some M.2 Card or Adapter.

There is also a possibility that the card you installed using the adapter might not show in the BIOS, but will work perfectly in the OS. And it only happens when the proper Hardware Drivers is installed.

Intel Wireless-Ac 9260, 2230, 2X2 Ac+Bt, Gigabit, No Vpro

Click on link to check out the current price of “Intel 9260 2230 Wi-Fi + Bluetooth 5 M.2 Card“: @Amazon US ($23.98), @Amazon UK (£44.94)@Amazon IND (N/A)@Newegg ($23.99).

M280M2 PCIe and USB Base M.2 Wireless Module to miniPCIe MotherboardClick on link to check out the current price of “M.2 A/E Key to mini-PCIe Adapter“: @Amazon US ($8), @Amazon UK (£5)@Newegg ($7.99).

Click on link to check out the current price of “M.2 B-Key to mini-PCIe Adapter“: @Amazon US ($15.99), @Amazon UK (£7.56)@Newegg ($16.59).

“That’s all for now, thanks for sticking with the article, and you know it will always good to let me know about the article, in the comments down below.” 🙂



  1. This is terribly a helpful post and provides the info that has its own importance. I found this one pretty fascinating and it will completely enter my assortment. It nice to go through this kind of data and keep sharing at intervals in future also.

  2. Are the mini PCIe-slots always going to be 1x, or may they sometimes be 2x or even 4x? Apart from the bandwidth limitation, would an operating system be able to access an NVMe drive attached to it? I realize that it’s unlikely to be bootable, but typically, such drives can be used for storage after an OS on a S-ATA interface has loaded drivers for it.

    • Q:Are the mini PCIe-slots always going to be 1x ?
      A: Surely yes. Because for higher bandwidth usage we already have M.2 slots.
      Q2:or may they sometimes be 2x or even 4x?
      A: No, it can’t be x2 or x4.
      Q3: would an operating system be able to access an NVMe drive attached to it?
      A: NVMe SSD dont comes in 60mm or 42mm form factor, so you have only left with to use a 42/60mm SATA M.2, which I’m preety sure is compatible to install an OS.

      • I already have an OS installed on an SSD in that laptop, so that’s not an issue. I want to try to get nvme on it as well, partially for better random access times and lower latencies, but mostly just for fun.

  3. Have you Seen A/E Key M.2 adapters? I have a Type M Key card as well as a Mini-PCIe card that I can use for my purposes (carrying PCI-E lanes over USB cables to hook up to PCI-E risers and run desktop GPU’s on laptops! But can’t find an A E card for my purpose and want to try adapting the others …

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