One of the easiest ways to unlock older AMD Athlon XP CPUs was called the "pin mod" method, because it was possible to unlock the CPU without permanently modifying bridges. A user could simply put one wire (or some more for a new multiplier/Vcore) into the socket to unlock the CPU. More recently however, notably with Intel's Skylake architecture, Intel had a bug with the Skylake (6th gen Core) processors where the base clock could be increased past 102.7 MHz, however functionality of certain features would not work. Intel intended to block base clock (BCLK) overclocking of locked processors when designing the Skylake architecture to prevent consumers from purchasing cheaper components and overclocking to previously-unseen heights (since the CPU's BCLK was no longer tied to the PCI buses), however for LGA1151, the 6th generation "Skylake" processors were able to be overclocked past 102.7 MHz (which was the intended limit by Intel, and was later mandated through later BIOS updates). All other unlocked processors from LGA1151 and v2 (including 7th, 8th, and 9th generation) and BGA1440 allow for BCLK overclocking (as long as the OEM allows it), while all other locked processors from 7th, 8th, and 9th gen were not able to go past 102.7 MHz on the BCLK.