I built a PC about early may and my network card ( the Asus PCE-AC55BT ) has been very dodgy only working about 1/2 the time on boot then it will sometimes drop all the 5ghz network connections then eventually all connections in general, I believe I still have the box and documentation for it. Is there any chance this could be the fault of the mother board? I have changed the PCI-e slot before for a more suitable slot with the gpu. What should I do?