I need a specific cooler. And question about undervolt

Ok. My laptop blows its air out of its left side. So which laptop cooler do you guys suggest me to get? I need something that cools and at the same time not so loud. Are there are any laptop coolers that use both usb and ac power?

Also is undervolting safe? Are there any risks of doing this? How much can it cool my cpu?

 

I would suggets the Targus ChillMat for a quiet cooler. Even in a silent room, it is barely more than a whisper. There is a version with and without a USB hub built-in.
Info on that cooler & underclocking can be found here:
http://www.notebookreview.com/default.asp?newsID=3005&guide=cooling+your+notebook

 

ok but is undervolting safe to do?

 

It shouldn't hurt your notebook as far as I know. I don't know what type of CPU you have, but I do know that undervolting my Pentium M works pretty well and takes about 4*C off the idle. Now it hovers around 42-45* vs. 46-48* with normal voltages.

However, if I did not use a cooling pad, I would not undervolt and here's the reason - the fans will be on and off when you are at full tilt because the CPU will be easier to cool, versus being on full speed all the time with regular voltages (at least with my notebook). And because the fans aren't on as often, the other components aren't getting as good of cooling as they would normally get under full load, and thus the overall notebook is hotter even though the CPU itself is a few degrees cooler.

 

I use a intel core duo. Yonah is name i think.
So undervolting wont make the cpu fan run less fast or the screen get less bright or anythig?

 

The CPU would not be any less powerful, it would just run at a lower voltage - it's less stable. Everything else should be untouched.

 

The only thing that can happen from undervolting the CPU is that the system may become unstable if you undervolt too far. That has nothing to do with how bright the screen is or anything like that. It just means your laptop may lock up and you have to reboot when you're doing something CPU intensive and it crashes since it's not getting enough voltage. The best way to do it is just to lower it a little bit at a time and check for several hours of stability using a program like Orthos which is the updated version of Stress Prime 2004.

 

Oh I do a lot of 3d graphics so I guess I should lower the voltage just a bit..

 

Undervolting will make your system less stable, especially under load. And with 3D graphics, that's going to do nothing but put a load on your system. I'd consider underclocking your GPU if you want to really cool things down.

 

This statement should be qualified. Undervolting too far will make your system less stable. Done properly, undervolting will have no negative impact on stability.

 

Well, you won't know until you crash, will ya? Better make sure you burn it in really well, at least 24 hours, to make sure it's stable. I've seen people cuss when they over/underclock/volt, and it seems stable for most usage, and keeps going, until they're really using it and it just dies on them.

 

I have an overclocked and undervolted comp. Works fine. 0,2 V on Dothan does the trick. Check my sig.

Cheers,

Ivan

 

That is a big part of undervolting properly. On Prime95 for 24 hours on each core.