Soldato
They should take it back because it is faulty.
Homework required to buy a CPU? So a consumer is expected to know everything about a product before buying it?? get at life mate..
When you buy a car, don't you first look online for potential issues and customer reviews?
So yes at this certain age, and always since the 90s, it does require to do your homework when buying computer parts. If you did it due to ignorance, then there is no excuse, especially in 2019 where takes 1 minute to do a google search.