Laptop Wi-Fi and Network Cards

Which socket and key does the laptop use?

Match the card to the socket inside the laptop. Current laptops use a small M.2 2230 Wi-Fi card in an A/E key slot, older ones use mini PCIe, and the oldest used PC Card or CardBus cards such as the 802.11b/g adapters listed here. Some modern Wi-Fi cards use the CNVi interface and only work on laptops whose chipset supports it, and a few older models restrict which cards they accept. Wi-Fi cards that are soldered to the board cannot be changed at all. Remove power and check the existing card before choosing.

Wi-Fi standards, security and antennas

Standards decide speed and security. The 802.11b and g cards in this listing top out at 11 and 54 Mbit/s and only offer WEP or WPA, which are weak by today's standards; modern routers expect WPA2 or WPA3 and faster 802.11n, ac or ax (Wi-Fi 6) radios. Wi-Fi 6E adds the 6 GHz band and needs a router that supports it. Internal cards attach to two small antenna cables already in the laptop, and Bluetooth on a combo card normally runs through the same slot. Gigabit USB Ethernet adapters are the simple wired option.

Questions about Laptop Wi-Fi and Network Cards

Can I upgrade my laptop's Wi-Fi card?

Often yes, if the card is in a socket rather than soldered. Identify the slot type, make sure the new card supports your laptop's interface and BIOS, and reconnect the two antenna cables when you fit it.

What is the difference between Wi-Fi 6 and Wi-Fi 6E?

Both use the 802.11ax standard. Wi-Fi 6E adds the 6 GHz band alongside 2.4 and 5 GHz, which gives less crowded channels, but you need a router that supports 6 GHz to benefit.

Is a WEP-only card safe to use?

No. WEP is easily broken, and cards limited to WEP or early WPA cannot use modern WPA2 or WPA3 networks. Replace them with a newer card or a USB adapter that supports current security.