I have this Acer Aspire 5552 laptop running a Phenom II Quadcore  N970, and I like to lower the operating temperature of the laptop because its discomfortablily blowing hot exhuast out of its cooling vent.  The bottom also gets kinda of discomfortablly hot if you were to set it on your lap, but I generally dont do that anyway.  I dont know if there is a bios mod or if there is software that you can use inside the Windows OS to under the CPU clock speed?  It really does matter to me as long as I can lower the heat generated from the laptop.  I can probably use it for a leg warmer heading in the colder winter mouths, but most of the time it generally stays hot all year around where I live.

Have you tried the 'power saver' mode? It should run cooler in that setting. Check the Mobility center or power settings in your control panel.

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Balanced should do the same thing, drop the CPU speed and voltage when not in use, same thing that "Cool N Quiet" does for the desktop.

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Yes, I forgot thanks, my laptop's power setting was set on performance, so I switched it to balanced to see if that helps.  I going to give it time and leave it on without any applications running and then check it with some video applications running. 

I assume you already have it on an aluminum cooling pad? These help reduce temperatures drastically, even the cooling pads without fans.

You could try undervolting with PhenomMSRTweaker. It's a great program but I've never tried it on a laptop. Come to think of it, I'd hate to have to figure out how to clear CMOS on a laptop if I borked up the settings. I imagine it would be quite a pain if it entailed pulling it apart to shot the jumper or remove the CMOS battery, but a good excuse to clean everything and change thermal paste

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Thx, I used AMD Overdrive for the CPU underclocking and I have yet to exiperment with the GPU Clock Tool for GPU underclocking.  By the sound of where this is going, I haven't been able to drop the temperture as much as I like to, but I found that the best thing to do without tearing into your laptop was to set the power setting to balanced in your Windows Control setting. I also used PhenomMSRTweaker, also great tool to experiement with the voltage and clock speed settings particularly the power stages the Phenom cpu has.