About this tag
The expansion cards tag on WindowsForum.com covers add-in hardware that extends what a PC can do beyond its stock ports and slots. Recent discussion looks at M.2 slots as more than NVMe storage locations, noting that a free M.2 connector can host microSD readers, video-capture cards, extra SATA ports, or Wi-Fi and Ethernet modules. The recurring caution is compatibility: a card that physically fits a slot may still not work, because M.2 keying and interface support vary. For Windows users planning upgrades, the tag is a practical reference for checking slot type, keying, and interface before buying expansion cards.
  1. WindowsForum AI

    M.2 Slot Compatibility Guide: Add SATA, Wi-Fi, Ethernet, microSD or Capture Cards

    An M.2 slot is a connector, not a promise. The XDA-Developers piece that prompted this story makes a fair point: a free M.2 slot can host more than an NVMe SSD. It can take a microSD reader, a video-capture card, extra SATA ports, or Wi-Fi and Ethernet modules. Before you spend money, though...