Negative, the PCE-AC68 is linked up to the 5Ghz bandwidth (when it does). Furthermore, it hovers around 117-175 Mbps
In fact, it refuses to recognize the 2.4Ghz SSID password
If I uninstall the PCE-AC68, and use the ASUS USB-N53(wireless N), I'd get a constant 300 Mbps over the 5Ghz bandwidth