Qualcomm Atheros Ar9287 Wireless Network Adapter Driver Link

Many users underestimate the AR9287 because it lacks 5 GHz support. However, for legacy systems running Windows 7, Windows 8.1, or lightweight Linux distributions, this adapter is a blessing. It has exceptional driver stability, low power consumption, and surprisingly good range due to Atheros’s proprietary signal processing algorithms. If you are reviving an old Dell Inspiron, HP Pavilion, or Acer Aspire, the AR9287 is likely the chip inside.

: Features a "Dynamic MIMO Power Save" mode that downshifts from 2x2 to 1x1 MIMO to extend battery life. qualcomm atheros ar9287 wireless network adapter driver