TL;DR: A Redditor says a sealed Ryzen 7 9800X3D bought at Walmart for about $500 wouldn't boot, had a chip serial that didn't match the box and looked different from other display chips; Walmart refused a refund. The claim is supported by photos but remains unconfirmed and neither Walmart nor AMD commented.
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A Reddit user says Walmart sold them a fake Ryzen 7 9800X3D inside what looked like a sealed retail box. Posting on r/pcmasterrace as u/quadbow, they explain that they wanted a replacement for their existing 9800X3D, which had memory controller issues. A clerk pulled the sealed box from a display case, and they paid almost $500 for it. At home, the PC wouldn't power on with the new chip. Putting the old 9800X3D back in got it running again right away.
Walmart then refused a refund because the serial number printed on the chip didn't match the one on the box. They compared it with other 9800X3D chips in the display case, and it looked very different. Apparently, the PCB was "more blue," and the text on the lid sat in a different place. They also ran the chip's serial number through AMD's lookup page, which returned no match.
Even though the Redditor says they're pretty sure it's a fake, that's still unconfirmed as of the time of writing. It's one account backed by photos, and neither Walmart nor AMD seems to have commented so far. The post doesn't say what's under the heat spreader either.
Were the earlier fake 9800X3D cases at Amazon similar to the Walmart case in this report?
Yes, in the sense that the Amazon cases also involved a sealed 9800X3D package that turned out to contain something wrong, and one of them also had a serial number mismatch. The Walmart case here is different because the buyer says the chip would not boot at all, the serial number on the chip did not match the box, and the purchase came from a Walmart display case rather than Amazon. Another separate Amazon story, "Amazon fake CPU warning: user orders AMD Ryzen 7 9800X3D, receives old-school FX-4100 instead," involved an FX-4100 in place of the 9800X3D.
What evidence would Walmart or AMD need to confirm a Ryzen 7 9800X3D is counterfeit?
Walmart or AMD would need to verify that the chip does not match its packaging and that its serial number is invalid in AMD's records, since the buyer says the chip's serial did not match the box and AMD's lookup returned no match. Stronger confirmation would come from a physical inspection like the GamersNexus case, where a fake Ryzen 7 9800X3D was delidded and found to have no CCDs or I/O die under the heat spreader. Right now, the account remains unconfirmed because neither company has publicly verified it.
How can shoppers inspect a sealed Ryzen 7 9800X3D for signs of tampering before buying?
Shoppers should compare the serial number printed on the chip with the serial number on the box before leaving the store. They should also inspect how the chip looks and compare it with other Ryzen 7 9800X3D samples in the display case, since the buyer said the PCB color and the placement of the text on the lid looked different.
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Fake 9800X3Ds aren't new, of course. GamersNexus delidded one and found no CCDs or I/O die under the IHS, and its serial number didn't match the box either. Another buyer found an i9-10900K in a sealed 9800X3D box. Both of those were Amazon purchases, though, while this one supposedly came off a Walmart shelf. The buyer's advice is to compare the serial number on the chip with the box, and how the chip looks, before leaving the store.
Hassam is a veteran tech journalist and editor with over eight years of experience embedded in the consumer electronics industry. His obsession with hardware began with childhood experiments involving semiconductors, a curiosity that evolved into a career dedicated to deconstructing the complex silicon that powers our world. From benchmarking PC internals to stress-testing flagship CPUs and GPUs, Hassam specializes in translating high-level engineering into deep, unbiased insights for the enthusiast community.
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