Police in Tainan, southern Taiwan, have seized a total of 60,000 suspect AMD CPUs after an AMD tip-off. The chips, which were defective CPUs that would normally have been destroyed, might have been stolen from one of AMD's three packaging and testing plants in Asia and shipped to Taiwan for re-marking. Millions of defective chips may have already been shipped for sale.
It should be painfully obvious that remarked and defective CPUs will not work properly. They may well work unstably, malfunction, and will in all likelihood refuse to be over clocked in any way, assuming that they do indeed work. Even if you think you are getting a bargain, remember that you are buying something that the manufacturer has deemed unworthy for sale, and something that has been stolen.