2) Turn windows on;
3) When windows finished booting, clip of the wire(now the BIOS will be enabled, but GPU will not read content from it)
3) Flash the original bios;
4) Turn off system.
5) unsold.
Have you tried it? Is it worked? Someone in another forum has tried it and worked properly, and another one makes that troubled card smoky.
Maybe the smoky one doing something wrong on those step, bad soldering or whatever.
I did see someone recommending using pin 1-5 on a different forum, which is incorrect(atleast on those cards ive had to do this). Always read the datasheet before you do anything with such things(it may be different on another chip), the point is to disable the BIOS so it will not load on boot. This is done with CS pin. Also be careful when soldering, shit can happen if you do it wrong :-D
This method is worst case. If your machine wont boot at all(to motherboard BIOS) after a flash, this is the way to do things. Ive had 1 RX550, two RX560 and 1 RX570 i had to go by this method.