Intel Dual Band Wireless-AC 7260 doesn't have problems if the OEM provided it with the laptop purchase such as the Dell XPS 12. If you replace your old WiFi card with the 7260 AC, you might encounter some connection problems since the card is intended for OEM only as well as the Haswell chipset. You can try the driver for Windows 8.1 here: Station-Drivers - Intel (Wlan & Lan)
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