If we are talking about this article, then: 1. this chip supposed to be old era memory chip (64bit of data -> 8 bytes) it wouldn't work on your PC 2. It was D

If we are talking about this article, then: 1. this chip supposed to be old era memory chip (64bit of data -> 8 bytes) it wouldn't work on your PC 2. It was DTMF chip not memory chip, so it couldn't work at all as a memory chip I guess the idea was that it costed $1, the seller shipped it, the chip would never work, but cost of shipping it back would be greater, so you would just eat the cost and move on. As with other kinds of fakes, they try to emulate the functionality, and often work, some even surprisingly better than expected, but they are always worse than originals. So either you won't get performance that's mentioned in the spec, or it break sooner or has some other issues that get apparent once you start using it.