I had a DW1560 in another PC working flawless on WiFi, but Bluetooth is not stable at all (and I need it so bad).
Purchasing the DW1820A was like giving a new try to this card that was supposed to work natively. If only the bluetooth works 100% then I'm happy. Activating the 5GHz band may be a matter of time, because the 2.4GHz band is working without doing nothing.
I will continue searching for a solution. These days I'll inject all USB's and then I'll try to activate the BT. If you find something about the 5GHz just let us know, I really appreciate all your help. Thank you!