In some cases, the laptop can not be overclocked, but even necessary.
For example, in my apparatus (ACER TravelMate 5520G-6A1G08Mi) memory at the nominal frequency of 1800 MHz processor clocked at 600 MHz DDR. When overclocking the bus 200 (800) to 222.5 (890) MHz, we not only causes the processor to operate at a "beautiful" in the frequency of 2 GHz, but also the memory now works at the nominal frequency of 667 MHz for her. I, however, did not stop there. Without raising the voltage on the core (and it is 65 nm to 31 W processor Athlon (Turion) X2 TK-55 is only 1,05V) processor also absolutely stably operates at 2100 MHz (234.5 (938) MHz frequency HyperTransport bus). Acceleration has successfully carried out as SetFSB, and ClockGen, only need to choose the right pll - ICS951416. With ClockGen I installed for my notebook standard frequency of 2100 MHz. Thus, Cool'n'Quiet technology remains fully operational so that the idle frequency of the processor is lowered to 938 MHz (instead of 800 MHz at the nominal frequency).
In addition, absolutely everyone (not just overclockers), I recommend to use a small and free utility RightMark CPU Clock Utility. She knows how to work successfully with virtually all processors from AMD and Intel last few generations, flexibly managing many parameters, such as energy-saving technologies. For example, on my Athlon X2 TK-55 you can control the CPU multiplier and voltage at its core. You can adjust the number of profiles, such as "Energy Saving", "Maximum Performance" and "performance on demand". The latter allows you to automatically and very flexibly control the speed of the processor depending on the degree of congestion. In addition, for each factor is allowed to choose their own electricity supply. I, for example, for the minimum factor 4.0 (wherein overclocking processor clocked at 938 MHz) is set voltage 0,8V. Some users claim that in their 800 MHz processor operates stably even with a voltage of 0,65V! As a result, the use of this tool allows you to kill several birds with one stone: to reduce power consumption and heat, extend battery life, reduce the noise of the computer.
Nor should we neglect to overclocking. I have such a Mobility Radeon HD 2600 (512 MB 2, the nominal frequencies in 3D-applications - 500MHz GPU / 400 (800 of DDR) MHz video memory). She, like the processor, thanks to its mobility is able to change the frequency in a variety of applications and disable inactive function blocks, but why would not it help? With this task will manage AMD GPU Clock Tool and ATITool. Personally, I use ATITool. At startup profile is automatically loaded with the frequencies of 110/297 (594) MHz (in the BIOS graphics for low load is prescribed such frequency mode). GPU temperature thus ranges from 33 to 38 degrees. When downloading any application or game of three-dimensional profile is loaded automatically with the frequencies of 625 MHz GPU / 450 (900 DDR) MHz video memory. For my copy such frequencies are absolutely stable. Some users are driven to the GPU and 650 MHz. On the temperature regime crackdown virtually no effect. During prolonged maximum load (in particular, about one hour Prime95 + "hairy cube" of ATITool) GPU heated to funny at present 55 degrees. Acceleration adds, and so not the slowest laptop fair bit of performance: results from the default settings for 3DMark05 - 7015 birds, 3DMark06 - 3730 birds.
In more detail, my and not only overclocking results and not only, sorry for the pun, are described inthis topic
Owners of laptops from other manufacturers, built on a similar component base (AMD M690 chipset, dual-core Athlon / Turion processors) were reported on the positive results of overclocking by the method I described.Post has been editedNicolasG - 21.02.08, 00:23