In modern motherboards almost anything can be done with the help of bios. To call it, just press del (in some versions BIOS'a key ctrl + F1). You can even several times for the faithful. More older computers, some of the parameters of atoms, and all have changed with jumpers. Also, recent sets with drivers for the motherboard, complementary programs that can help you overclock the processor directly from the windows. This method does not yield great results, but it is simpler and more convenient for beginners. Besides, he does not always require a reboot. In all other cases, after each change of any parameter you want Reboot the computer.
Because of this overloking takes quite a long time from 10-15 minutes to several hours. How could link together our options? We have the fsb and cpu multiplier. Multiplying them, we obtain the frequency of the processor. For example: a 200 MHz bus speed and multiplier 15x. As a result, we have a processor with 3 GHz. Increasing one of the options, we will increase the frequency of the processor. But Not all processors, all parameters can be change.
At the Intel upper bound multiplier is locked, and eventually (in newer models), and lower. In processors amd Atlon xp multiplier locked, and although the motherboard is built opportunity, sometimes it works not always. Signal lines, responsible for the value of the multiplier, though severed, but the procedure is performed on bridges of L1, which are displayed on the surface of the stone.