Besides hdd/sdd serial number, EAC includes smbios info(baseboard serial), permanent MAC, cpu specifications as well as few windows register lines in their hardware scan. Changing your hdd won't be enough, at least you should do a clean Windows installation and most likely you will have to change(spoof) your motherboard and network card (smios/mac). Your IP and payment method doesn't matter so don't bother with it. DBD is free till tomorrow, you have some time to try avoiding your hwid ban.