How to Replace or Upgrade a Laptop Wi-Fi Card (Desktop Too)

On a lot of laptops the Wi-Fi card is a small board held in by one screw, with two thin antenna wires clipped on top. Swapping it is one of the easier upgrades you can do. The hard part isn't the screwdriver work. It's buying a card your laptop will actually accept. Some cards only work with certain Intel processors, and some laptops refuse cards they weren't sold with. This guide covers how to check all of that first, then do the swap.

Before you buy anything, make sure the card is really the problem. If Wi-Fi drops out, see laptop Wi-Fi keeps disconnecting. If no networks show up at all, see laptop Wi-Fi not showing any networks. If it connects but nothing loads, see laptop connected to Wi-Fi but no internet.

Step 1: Make sure the card is really the problem

A new card won't fix a router problem, a bad driver, or a setting. Plug in a USB Wi-Fi adapter. If it sees networks and stays connected where the built-in Wi-Fi doesn't, the built-in card, its antennas, or its driver is the problem.

Also check Device Manager. Right-click Start and pick Device Manager, then open Network adapters. If the Wi-Fi card is missing there even after the checks in laptop Wi-Fi not showing any networks, the card may be loose or dead.

If you're upgrading for speed or Bluetooth rather than fixing something, skip ahead to Step 2.

Step 2: Check that the card can be swapped

Not every laptop has a removable Wi-Fi card.

• Many thin laptops have Wi-Fi soldered to the motherboard. All recent MacBooks do.
• Some laptops use a smaller soldered-down format (sometimes listed as M.2 1216). Those can't be swapped at home.
• Search your exact model plus "service manual" or "hardware maintenance manual." Dell, Lenovo, and HP publish these for many models, and they show the Wi-Fi card and how to reach it. iFixit also has guides for a lot of laptops.

If it's soldered, a USB Wi-Fi adapter is your fix.

Step 3: Find your current card's model and size

In Device Manager, under Network adapters, the Wi-Fi card's name usually shows the model (for example "Intel(R) Wi-Fi 6 AX201" or "Realtek RTL8822CE"). Write it down. It tells you a lot in Step 5.

Most laptops from the last several years use an M.2 2230 card: 22 mm wide and 30 mm long, with an "E key" notch. Some older laptops used a longer M.2 2242 or an older "half mini PCIe" card. Your service manual or a look at the card will tell you. The size and notch on the new card need to match the slot.

Step 4: Check for a BIOS whitelist

Some laptops, mostly older Lenovo and HP business models, only accept Wi-Fi cards from an approved list in the BIOS. Put in a different card and the laptop may refuse to boot with an error such as Lenovo's "1802: Unauthorized network card is plugged in" or HP's "Unsupported wireless network device detected".

How to check:

• Search your model plus "whitelist" or "1802 error."
• Your laptop maker's parts list (often in the service manual) shows which cards it officially supports. Buying one of those is the safe choice.
• Don't flash modified BIOS files from forums to get around it. A bad flash can brick the laptop.

Most consumer laptops from recent years don't have a whitelist, but it's worth two minutes to check.

Step 5: Pick a card that will work

CNVi vs PCIe. This is the big one.

• Intel CNVi cards (like the AX201, AX211, AX101, and BE201) are only part of a Wi-Fi card. The rest of the Wi-Fi hardware is built into certain Intel processors. They only work in laptops with a matching Intel chipset. They won't work in AMD laptops, and often won't work in older or different Intel ones.
• PCIe cards (like the Intel AX200, AX210, and BE200, and most Realtek and MediaTek cards) are full cards and work in most M.2 E key slots.
• If your current card is a CNVi card, a CNVi card from the same family usually works, and so does a PCIe card in most cases. If it's a PCIe card, buy a PCIe card. Check the new card's spec page if you're not sure.

Wi-Fi 6, 6E, or 7, and your Windows version.

• Wi-Fi 6 (like the AX200): works on Windows 10 and 11.
• Wi-Fi 6E (like the AX210): adds the 6 GHz band. The card works on Windows 10, but the 6 GHz band needs Windows 11. Your router also has to support 6E to use it.
• Wi-Fi 7 (like the BE200): Intel lists it for Windows 11, not Windows 10. Some laptops, including many AMD ones, have reported problems with it. Check the maker's supported platforms list before you buy.
• A newer card only helps if your router supports the newer standard. A Wi-Fi 7 card on a Wi-Fi 5 router will run at Wi-Fi 5.

Bluetooth. Most of these cards include Bluetooth too, and it replaces your old Bluetooth. That's normal.

Step 6: Get ready

• Download the Wi-Fi and Bluetooth drivers for the new card before you start, from the card maker (for Intel cards, Intel's site or the Intel Driver & Support Assistant) and save them to a USB stick or the desktop. Windows often has a driver built in, but not always, and you'll have no Wi-Fi to fetch one.
• Shut down fully. Hold Shift while you click Shut down, so Fast startup doesn't just hibernate the laptop.
• Unplug the charger and anything connected.
• Work on a clear table with good light and a small dish for screws.
• Follow anti-static habits that matter. Touch bare metal first, or wear an anti-static strap.

Step 7: Open the laptop and disconnect the battery

• Remove the bottom cover screws. Some are hidden under rubber feet or stickers, and some are captive (they stay in the cover). Your service manual shows where they are.
• Start at a corner or seam with a plastic pry tool and work around slowly. Don't force it. If it won't give, there's usually a screw you missed.
• Unplug the battery connector from the motherboard before you touch anything else. Pull it straight out by the plug, not the wires. On some laptops there's a BIOS option to disable the battery for service instead. Use it if your manual says so.
• If the battery looks puffy or the cover was pushed up, stop and see swollen laptop battery.

A good screwdriver set makes this much easier: precision screwdriver set.

Step 8: Unclip the antenna wires

The card has two tiny round connectors with thin wires clipped on. On 2230 cards these are usually MHF4 plugs, which are very small and easy to damage.

• Take a photo first so you know which wire goes where.
• Lift each plug straight up with a plastic spudger or a fingernail, right under the plug. Don't pull on the wire, and don't pry sideways.
• Note any labels. The card is usually marked MAIN and AUX, or 1 and 2. On many laptops the main wire is black and the aux wire is white or gray, but check your photo and manual rather than assuming.

Step 9: Swap the card

• Remove the single screw holding the card down. Some laptops have a metal shield or bracket over the card. Lift it off and keep it.
• The card pops up at an angle. Slide it straight out of the slot.
• Slide the new card in at the same angle, gold contacts first, with the notch lined up with the slot. It should go in most of the way without force.
• Press it down flat and put the screw back in. Snug is enough. Don't overtighten.

Step 10: Reconnect the antennas

• Line each plug up straight over its connector on the new card, matching your photo (MAIN to MAIN, AUX to AUX).
• Press straight down with a flat tool or fingertip until it clicks. It should sit flat and not spin loose.
• If a plug won't stay on, or a wire is cut or crushed, replacement antenna pigtails exist, but routing new ones through the lid is a bigger job. A plug that's only a little loose sometimes seats with a firmer, straighter press.
• Swapping the two wires won't damage anything, but Wi-Fi can be weaker. If you only have one antenna connected, Wi-Fi will work but often with a weaker signal and slower speeds.
• Tuck the wires back into their channels so the cover won't pinch them.

Step 11: Close it up and install drivers

• Reconnect the battery (or re-enable it in the BIOS), refit any shield, and screw the bottom cover back on.
• Plug in the charger and turn it on. If you get a whitelist error from Step 4, power off and put the old card back.
• Right-click Start and open Device Manager. Look under Network adapters for the new card, and under Bluetooth.
• If you see "Network Controller" under Other devices, or a yellow warning, install the Wi-Fi driver you saved in Step 6. Then install the Bluetooth driver too. They're separate.
• Restart.

Connect to Wi-Fi:

• Windows 11: Settings > Network & internet > Wi-Fi.
• Windows 10: Settings > Network & Internet > Wi-Fi.

Check Bluetooth:

• Windows 11: Settings > Bluetooth & devices.
• Windows 10: Settings > Devices > Bluetooth & other devices.

You may need to pair your Bluetooth mouse, headphones, or controller again.

Uninstall any old Wi-Fi utility from the old card's maker if it's still there (Settings > Apps).

If Wi-Fi works but Bluetooth doesn't show up at all, a driver is the usual cause. On some laptops a BIOS setting can also turn Bluetooth off.

Desktops: adding or replacing a Wi-Fi card

Desktops use the same kinds of cards, in one of two places.

• Motherboard M.2 E key slot: Many motherboards have a small M.2 slot for Wi-Fi, often under a cover near the rear ports. Some boards sold "with Wi-Fi" have the antenna connectors already built into the rear panel. Check your motherboard manual for which cards it supports, since some slots only support CNVi or only PCIe cards.
• PCIe adapter card: If there's no Wi-Fi slot, a PCIe x1 Wi-Fi card goes in a spare PCIe slot. Many come with an M.2 card already fitted and external antennas that screw onto the back.
• Bluetooth on a PCIe adapter usually needs its small USB cable plugged into a USB 2.0 header on the motherboard. Without it, Wi-Fi works but Bluetooth doesn't.
• Power off and flip the switch on the back of the power supply first. If your PC is dusty inside, clean a dusty desktop without killing it is a good thing to do while it's open.

When it still doesn't work

• The laptop won't turn on after the swap: check the battery connector and that the card is fully seated. See laptop won't turn on.
• The new card doesn't show in Device Manager at all: it may not be compatible (CNVi in the wrong laptop, or a whitelist). Try the old card. If the old one shows up, the new card isn't a match.
• Weak signal after the swap: an antenna plug is loose, swapped, or wasn't reconnected. Open it back up and check.
• Still dropping out: see laptop Wi-Fi keeps disconnecting.