In regards to the current price of gpus, I would suggest simply replacing only your motherboard and ssd, if u have an intel processor, I suggest to get a similar ssd to the one u currently have and raid 0 it. Do a full windows 10 reinstall, and disconnect any hard drive you could have cheats installed on. That simply will get you unbanned on those games. You could go for the spoofer route as well, that will be less costly for hardware, but then again, if your looking for the last option solution, this is the way. Even if the gpu has a bannable hwid, I don't think replacing the others will affect it if you decide to keep it since those games wouldn't ban people who purchased banned used gpu's with new hardware anyways, it wouldn't make much sense for a company since most sold used items are gpus > motherboards, ssds. Optional, reset your public Ip. Every other hardware component wont matter.