How to Install an M.2 NVMe SSD, Step by Step

Installing an M.2 NVMe SSD is one of the easiest and most worthwhile PC upgrades. There are no cables, no drive bays and no power connectors: the drive plugs straight into the motherboard. Most of the work is choosing the right slot and avoiding a couple of small mistakes that can cost you performance or cause overheating. This guide covers desktop PCs. Laptops follow the same idea but vary widely, so check your laptop's manual first.

Before you start: check compatibility

Form factor. Most desktop NVMe drives are M.2 2280, meaning 22mm wide and 80mm long. Almost every modern motherboard supports this size. Smaller sizes like 2230 and 2242 are mainly used in laptops and handheld gaming PCs.

Slot type. Most M.2 slots on modern boards support NVMe drives, but some older or budget boards have slots that only accept SATA M.2 drives. Your motherboard manual or product page will say which slots support "PCIe" or "NVMe".

Which slot to use. If your board has more than one M.2 slot, they aren't all equal:

• The slot closest to the processor is usually connected directly to the CPU. It's the fastest, and on newer boards it's often the only one that supports PCIe Gen5. Use it for your main or fastest drive.
• Other slots usually run through the motherboard's chipset. They're still fast, but may be limited to Gen4 or Gen3.
• On some boards, using certain M.2 slots disables one or two SATA ports, or reduces the bandwidth available to the graphics card slot. The manual lists these trade-offs, usually in a table near the M.2 section.

What you need

• The SSD
• A small Phillips screwdriver (size #1 fits most M.2 screws and heatsink covers)
• Your motherboard manual, or its PDF from the manufacturer's website
• Five minutes of clear desk space and decent lighting

Many recent motherboards use tool-free latches instead of a tiny screw. Check the manual so you know what to expect before you open the case.

Step 1: Power down and prepare

1. Shut down Windows completely, then switch off the power supply using the switch on the back and unplug the power cable.
2. Press and hold the PC's power button for a few seconds to drain any remaining power.
3. Lay the case on its side with the motherboard facing up, and remove the side panel.
4. Touch a bare metal part of the case to discharge any static electricity from your body before handling components.

Step 2: Find the slot and remove its cover

Locate the M.2 slot you've chosen. On most modern boards it's under a metal heatsink cover held by one or two screws. Remove the cover and set the screws somewhere safe.

Check the underside of the heatsink. There's usually a thermal pad stuck to it, and new boards often ship with a thin plastic film over that pad. Peel the film off. Leaving it on is one of the most common installation mistakes and stops the heatsink from cooling the drive.

Step 3: Set the mounting point

M.2 slots support different drive lengths using a small standoff or latch at the far end. Make sure it's in the 2280 position for a standard desktop drive. On most boards it's already set there, but if your drive is a different length, move the standoff to the matching hole.

Remove the small M.2 screw, if your board uses one, from the standoff.

Step 4: Insert the drive

1. Hold the SSD by its edges, with the label facing up.
2. Line up the notch in the drive's gold connector with the key in the slot. It only fits one way.
3. Slide the drive into the slot at an angle of about 30 degrees, pushing gently until most of the gold contacts disappear into the slot.
4. Press the other end of the drive down flat against the standoff. It will spring up slightly. That's normal.
5. Secure it with the M.2 screw or the tool-free latch. Tighten the screw only until it's snug. Overtightening can bend the drive or strip the tiny thread.

Leave the label on the drive. On many SSDs the label acts as a heat spreader, and removing it can void the warranty.

Step 5: Refit the heatsink

Place the motherboard's heatsink cover back over the drive and screw it down, so the thermal pad makes contact with the SSD.

If your SSD came with its own heatsink attached, use either the drive's heatsink or the motherboard's, not both. Stacking them won't fit properly and can stop either one from making good contact. PCIe Gen5 drives run hot and should always have a substantial heatsink.

Put the side panel back on, plug the power cable in and switch the power supply back on.

Step 6: Check the drive is detected

Start the PC and enter the BIOS by pressing Delete or F2 during start-up. Look for a storage, NVMe or M.2 section, or check the main summary screen. Your new drive should be listed by model name.

If it appears, save and exit. If it doesn't, see the troubleshooting section below.

Step 7: Set it up in Windows

A brand-new drive won't appear in File Explorer until it's set up. If it's an extra drive alongside your existing one:

1. Right-click the Start button and choose Disk Management.
2. Windows will usually prompt you to initialise the new disk. Choose GPT and click OK.
3. Right-click the large "Unallocated" area for the new disk and choose New Simple Volume.
4. Click through the wizard, accepting the defaults. Choose a drive letter and give it a name if you like.
5. When it finishes, the drive appears in File Explorer and is ready to use.

If this drive will be your new boot drive, you can either install Windows fresh onto it from a USB installer, or clone your old drive onto it using your SSD maker's cloning tool. Many manufacturers, including Samsung, WD and Crucial, offer free migration software for their own drives.

Troubleshooting: drive not detected

• Reseat the drive. Power off, remove it and reinsert it firmly at the correct angle before screwing it down. A drive that isn't fully seated is the most common cause.
• Check the slot in your manual. Some slots are disabled when certain SATA ports are in use, or only support SATA M.2 drives.
• Look for slot settings in the BIOS. A few boards let you switch an M.2 slot between modes, or disable unused slots.
• Update your BIOS. Older BIOS versions sometimes don't recognise newer drives, especially Gen5 models.
• Try a different slot, if your board has more than one, to rule out a faulty slot.

The short version

Use the M.2 slot closest to the processor for your fastest drive, peel the plastic film off the heatsink's thermal pad, insert the drive at an angle and screw it down gently, then check it appears in the BIOS. In Windows, initialise it as GPT in Disk Management and create a new volume. The whole job takes about ten minutes.