@RangerZ
There are dual band (2.4/5Ghz cards) : https://www.compex.com.sg/wifi-module/ scroll down in the page.
WLE900VX is 3x3@2.4GHz and 3x3@5GHz
WLE600VX is 2x2@2.4GHz and 2x2@5GHz <-- i bought mine with my APU2C4 at PCengines.ch
WLE200NX is 2x2@2.4GHz and 2x2@5GHz