RMClock Setting Up:
Below is how i tweak my AMD Turion 64 X2 TL-50 1.6Ghz, I not sure about other model's settings as I don't have other processors. I don't guarantee that even the same AMD processor as mine will be stable when use such setting.
*Stable = no freezes, crashes, other weird stuff happening under idle, light or heavy load. So far, it works for me.
*Don't worry if you think you got the wrong setting, just exit the program totally including the taskbar icon, then the setting won't affect
windows. If window somehow crash or freeze, reset the laptop to remove the RMClock setting. There is a way to make the setting permanent
at startup, but i don't set it though.

1) look under download section, Rightmark CPU Clock utility (RMClock), you can choose to download the "exe" version or the "rar" version of executable and data files. Install the program and run it.

2) under the 'management' tab, i leave all to default, except that i change the "CPU default selection' setting to 'CPU-defined default FID/VID'. click the apply button situated bottom right.

3) then, go to the 'profile' tab, i changed my settings as referred to pic3 diagram, I unchecked index 1 & 3, and I changed my voltage at 8.0x from 1.075V to 1.025V. Click apply button situated bottom right.

4) under the 'profile' tab too, there are 4 subtabs, i just choose 'performance on demand" subtab.
5) under 'performance on demand' subtab, I checked the 'use P-state transitions (PST) ' under AC power and Battery section, I checked index 0,2,4. Then at the lower section, i changed the CPU target usage % to 40. Click apply button situated bottom right.

6) ok, so now the settings is done, we will need to activate the profile. There are 2 ways to do this.
a) go to 'profile' tab' , under profile selection, choose performance on demand option. Then click the apply button situated bottom right.
b) this is a shortcut, under the taskbar, there will be the rmclock icon, you can click the icon, goto 'curent profile', and choose performance on
demand.

8) Done!
Source from Eterman