To meet demand in this situation, Intel takes fast parts and sells them as a slower speed grade. Such a part can easily be overclocked, as it is designed to run faster than its label indicates. A favorite of overclockers is Celeron, a part that typically yields at 400 MHz or more but that Intel sells at rated speeds as low as 333 MHz. Raising the bus speed can cause similar problems with other system components. For these reasons, overclocking voids the product warranty.
Some hobbyists are willing to take their chances with crashes and warranty problems.
What really concerns Intel, however, is that some PC buyers are getting overclocked CPUs unknowingly. Although this fraudulent activity is illegal, it can be very profitable, as the relabeled chips can be sold for hundreds of dollars more than their original cost. After finding that remarkers could easily scrape off and repaint the labels on its chips, Intel added features to its recent products to dissuade overclocking. Older Pentium II CPUs read their bus-clock multiplier from signals on the module. Celeron and newer Pentium II processors have their clock multiplier hard-coded in the chip.