All you can do is go through with the RMA, the procedure, even generally after the initial warranty the seller provides, is that the sellers return the cards to AMD/Sapphire/Etc after they test them and verify they are damaged or what have you, it is unfortunate but it has been this way for close to 20 years, it isn't going to change now.
Seriously, how do you know that?
In that case I wait from AMD/Sapphire/Etc for consent to GPU's direct return to manufacture in China or anywhere, need delevery adress, also I need computeruniverse consent to compensate me standard shipping cost in amount of 40 euros each card,
And then my assistant will bring cards personally to this address in time earlier than 4 months. Why not ?
Otherwise AMD/Sapphire/computeruniverse/Etc don't respect their customers and don't want to improve quality and services of their products.