Software overclocking is carried out with the use of programs that control the clock generator. However, for the program to work you must know the model of the clock generator. And it needs or to disassemble the laptop and look for a chip on the motherboard, or to pick up manually. And the list is quite large.
There are still a few snags in the use of programs for overclocking:
Control software do not support all the PLL-IC;
Acceleration can be hardware blocked. In this case, you will not be able to overclock the laptop program, even though the model TG;
New TG in laptops produced very often, and sometimes takes a lot of time to add support for such TG in the database.
BSEL-mod. Using this method is used to supply high and low levels on the BSEL pins of the CPU. Under low and high levels should understand the voltage of a particular magnitude and for different processor it has a different meaning. The corresponding pins of the CPU are isolated or closed to the ground. This leads to a noticeable overclocking of the processor.
But even here there are pitfalls:
Latest chips for laptops from Intel after this method block for the X6 CPU multiplier, whereby it is possible to obtain the opposite effect – the frequency will go down;
This way you can switch the FSB frequency only at standard level (133, 166 266, etc.);
The chipset may not support the FSB speed, then the acceleration may fail.
Mod the clock generator. Here we are talking about direct intervention in the electrical circuit that connects the TG and the processor chip. Similar to the BSEL mod, but it is held with BSEL-pins not of the processor, and IC TG.
That's what the pros of this method:
This method works fine on almost all laptops;
This acceleration cannot be locked neither in hardware nor in the BIOS.
But the disadvantages of:
Technically difficult, requires knowledge of certain theoretical data and the ability to handle a soldering iron except the soldering iron requires several technical devices;
The frequency is switched only at standard level, as in the case of the second method;
This method of acceleration the same as the first frequency causes the memory to increase in line with the FSB frequency. This will mean that we can rest in the memory.