In the before times (fall of 2019) when used graphics cards from Chinese vendors on Ebay were plentiful and affordable, I bought a AMD HD 7xxx something for a S775 WinXP build. When I received it, it had some issues giving me a display , then finally wouldn't give me a display at all. Before asking for a refund, I went as far as pulling the heat sink assembly off to apply new thermal paste, and that's how I discovered what had happened. My understanding was that these cards were from Chinese cyber cafes, and it seems they have people reapply thermal paste. They are likely working in a hurry to do as many cards as possible in a short time, and when they put the heat sink back on the thermal pad for one of the memory chips got doubled up on one chip, while another ended up with no pad. This prevented the heat sink from making proper contact with the die, which promptly overheated and fried. There was a back and forth until I was finally able to prove to their satisfaction that the card was dead, and they finally gave me a refund.
A lot of times when you first start out on a project you think, This is never going to be finished. But then it is, and you think, Wow, it wasn't even worth it. - Jack Handey