The WiFi card can be working fine. Looking to see if there is a conflict between the graphics card and the WiFi card. If the PC boots fine without the WiFi card, then the conflict can still be several things from driver conflicts to IRQ conflicts, but at least you would know where the conflict is centered. Have you tried booting with everything removed but the bare estentials, just the boot drive and graphics card connected to the board? Then adding one item back at a time till it does not boot.