The most common non-SSD use for an M.2 slot is a compatible Wi-Fi module—but only if the slot is designed and wired for wireless connectivity. M.2 is a connector and form-factor family, not a universal expansion interface, so a card that fits physically may still be incompatible.
What can an M.2 slot do besides store data?
A dedicated M.2 Wi-Fi socket can accept a compatible wireless module. Some modules also provide Bluetooth, but the module and computer must support that function. ASUS manuals, for example, identify Key E sockets for Wi-Fi modules, including an E-key, 2230-size socket in the Pro WS WRX90E-SAGE SE manual and a Wi-Fi module socket in the Pro H610T-CSM manual.
As an Amazon Associate I earn from qualifying purchases.
Other M.2 sockets are intended for storage, and their supported interfaces can differ. A Key M socket may support PCIe, SATA, or a specified combination; its key alone does not tell you every function it supports. The ROG STRIX B365-G GAMING manual, for example, distinguishes storage sockets with different PCIe and SATA support from a separate M.2 Wi-Fi socket.
Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →What to check before using or buying an M.2 module
- Find the exact computer or motherboard model. Use its manufacturer manual or specifications, not a general description of M.2.
- Confirm the socket’s purpose and key. Check that it is identified for the module’s function, such as Wi-Fi, rather than assuming a storage socket can take a wireless card.
- Match the module dimensions and interface. Verify the supported module length and required signals, such as PCIe, SATA, or USB, against the socket specification.
- Check the supporting hardware and software. A Wi-Fi module may need antenna leads, compatible firmware, operating-system support, and regional radio support.
- Read the fine print for board-specific limits. Look for shared lanes or ports and processor-dependent restrictions. The ASUS TUF GAMING B850M-E WIFI specifications list different M.2 PCIe capabilities depending on processor family.
How common M.2 uses compare
| Use | What must be true | What to verify |
|---|---|---|
| Wi-Fi module, potentially with Bluetooth | The computer has an M.2 socket intended and wired for a wireless module. ASUS documents dedicated Wi-Fi sockets, including an E-key, type 2230 example. | Socket purpose and key, module size and interface, antenna connections, firmware and operating-system support, and regional radio support. |
| PCIe or SATA storage | The particular socket supports the drive’s protocol. ASUS documents storage sockets with different PCIe and SATA capabilities on one motherboard. | PCIe versus SATA, supported drive length, lane or generation limits, boot support, and any shared SATA ports. |
| Cellular modem or other expansion | Compatibility is device-specific; general plug-and-play support is not established. | Required signals, key, antennas or SIM provisions, firmware restrictions, drivers, and host support. |
Why physical fit is not enough
M.2 sockets and modules use different keys, sizes, and electrical interfaces. A module may line up with a connector yet lack the signaling, firmware support, or board wiring it needs. Even sockets on the same motherboard can have different supported interfaces. Treat the exact model’s manual as authoritative, and do not assume a Key M SSD socket can take a Wi-Fi card just because both are M.2.
#1 Best Overall
- MEET THE NEXT GEN: Consider this a cheat code; Our Samsung 990 PRO Gen4 SSD helps you reach near max performance with lightning-fast speeds; Whether you’re a hardcore gamer or a tech guru, you’ll get power efficiency built for the final boss
- REACH THE NEXT LEVEL: Gen4 steps up with faster transfer speeds and high-performance bandwidth; With a more than 55% improvement in random performance compared to 980 PRO, it’s here for heavy computing and faster loading
- THE FASTEST SSD FROM THE WORLD'S FLASH MEMORY BRAND: The speed you need for any occasion; With read and write speeds up to 7450/6900 MB/s you’ll reach near max performance of PCIe 4.0 powering through for any use
- PLAY WITHOUT LIMITS: Give yourself some space with storage capacities from 1TB to 4TB; Sync all your saves and reign supreme in gaming, video editing, data analysis and more
- IT’S A POWER MOVE: Save the power for your performance; Get power efficiency all while experiencing up to 50% improved performance per watt over the 980 PRO; It makes every move more effective with less consumption
Can you use a cellular modem or another expansion card?
Possibly, but only where the computer is specifically designed to support that module. Cellular devices and other expansion hardware can require particular PCIe or USB signals, antenna connections, a SIM arrangement, firmware approval, and drivers. Without those details in the system’s documentation, do not assume the module will work.
Quick Recap
Best Value
- SPEED UP PROJECTS. Launch creator applications fast with uncompromising PCIe 4.0 read speeds up to 7,100MB/s,[2] (1TB and 2TB[1] models) and write speeds up to 6,700MB/s[2] (1TB[1]-4TB[1] models).
- CREATE AND STORE MORE. Make more room for your 4K videos and high-resolution images with capacities from 500GB[1] up to 4TB[1] on M.2 2280 built with our trusted 8th generation SANDISK BiCS QLC 3D CBA NAND.
- IT GOES WHERE YOU GO. With an all-new power efficient design, your drive delivers high performance with low power, giving you more time to be productive while on the go.
- UNCOMPROMISED RELIABILITY. With up to 1,200 TBW[3] (4TB[1] model) endurance rating, your drive is designed for creators.
- KEEP YOUR DRIVE UPDATED. Monitor your SSD’s performance and check for updates with the downloadable SANDISK Dashboard application.[5]
Rank #4
- HUGE SPEED BOOST: Get random read/write speeds that are 40%/55% faster than 980 PRO; Experience up to 1400K/1550K IOPS, while sequential read/write speeds up to 7,450/6,900 MB/s reach near the max performance of PCIe 4.0*
- BREAKTHROUGH POWER EFFICIENCY: Use less power and get more performance; Enjoy up to 50% improved performance per watt over 980 PRO, plus optimal power efficiency with max PCIe 4.0 performance**
- SMART THERMAL CONTROL: Samsung's own nickel-coated controller delivers effective thermal control; With its slim size, 990 PRO is a perfect fit for desktops and laptops that meet the PCI-SIG D8 standard***
- THE CHAMPION MAKER: Up to 65% improvement in random performance enables faster loads for an ultimate gaming experience on PS5 and DirectStorage PC games****
- SAMSUNG MAGICIAN SOFTWARE: Get the most out of your SSD with Samsung Magician's advanced yet intuitive optimization tools; Monitor drive health, protect valuable data, and receive important updates for your 990 PRO
Rank #3
- This product has been replaced by our latest generation. Please search for the SANDISK Optimus GX 7100 NVMe SSD
- HIGH-OCTANE GAMING. Experience speeds up to 7,250MB/s read and 6,900MB/s write (1-2TB models), with up to 35% faster performance than previous generation.
- PURPOSE-BUILT. Designed for serious on-the-go gamers, with a PCIe Gen4 interface and SANDISK’s next generation TLC 3D NAND.
- MORE TIME TO CLEAR THAT CHECKPOINT. Built with laptops and handheld gaming devices in mind, with up to 100% more power efficiency over the previous generation.
- DO MORE WITH DASHBOARD. Ensure your drive is optimized for prime performance with the downloadable WD_BLACK Dashboard (Windows only).
Rank #2
- Ideal for high speed, low power storage
- Gen 4x4 NVMe PCle performance
- Up to 6,000MB/s read, 4,000MB/s write
- Includes Acronis cloning software
- 5-year limited warranty
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
