I started another thread about ordering a new AMD CPU that was unavailable in Australia from an eBay seller in China. He has 3K+ sales and a 99.5% rating, and the price was fair, so it seemed reasonably safe. What arrived was an old used Intel CPU. He claimed it was a mistake, and given his good rating I accepted his offer to replace it with the correct item.
https://www.ebay.com.au/itm/145919678288
When the second package from him arrived I opened it at the police station in front of a police officer as a witness. What was in there looked right. It was clearly a Ryzen. And new. And it was labelled identifying it as the model I'd ordered. It all looked good. Simply a mistake.
But when I put it in a new ASUS AM5 motherboard it was dead. UMart checked the motherboard, and it was "no fault found". So it looked like the seller had sent me a dead CPU. Which was hard to understand because these things are quality checked ex-factory, so the only way to kill one is to mistreat it seriously negligently. Or deliberately. That was my first suspicion. That he was getting revenge for being caught out trying to scam me the first time.
The truth, after investigation, was worse than that.
Its an elaborately manufactured fake CPU. There's a substrate, with contacts on the bottom, and a lid on the top, and the lid has the apparently right writing on it. But there's nothing under the lid. No silicon.
https://community.amd.com/t5/general-discussions/have-i-got-…
The two clues it is a complete fake are that the writing on it is the correct style for a 7000 series Ryzen, but not an 8000 series, and there should be tiny components visible between the legs of the lid, and there aren't. A search around eBay shows heaps of sellers selling the, and lots of different AMD CPUs. They are easy to pick when you've been caught, and know what to look for.
I can return it. But he'll just palm it off to someone else.
I've reported it to eBay as a counterfeit/fake. That would mean it would be destroyed rather than returned. But who knows if eBay will take up the case. And I still have the problem of proving its a fake. Who do you go to to certify a fake computer chip?
I've tried to offer it to an Australian computer magazine as a story. They de-lid it and show there's nothing inside, and warn their readers. And certify it a fake. No takers so far.
https://www.youtube.com/watch?v=L7C_x5EI-fQ