It came directly from Amazon and arrived in a sealed box
WTF?! It appears that Amazon still sells the occasional CPU that turns out to be a fake. The latest incident involved a Ryzen 7 9800X3D ordered by a reviewer for a test system that was actually an AMD FX-4100 CPU from 2011.
If you're looking for a solid budget processor, this Ryzen 5 5600T deal is worth checking out. Packing 6 cores and 12 threads, just like the 5600, but with a higher base clock of 3.7 GHz. It also keeps the same 65W TDP and 32MB L3 cache, making it an excellent value pick for gaming and productivity at this price point.