i think the most important thing is the air flow because the main reason we using notebook cooler is to make air flow so it can cool our laptop.

if small fans,then they have to use high speed to increase the air flow.

i'm using Vantec Lapcool 4, 160mm fan, 600rpm ...80CFM
http://www.vantectw.com/eng/index_eng.html <--have a look

very light, and sound? wat sound?there's no sound!

actually i think the concept is almost the same,just that by blowing in the air,you will carry more dirt particles into the machine than sucking out the air.

but sucking the air in and hit it on the targeted area,eg. the processor will make a big diffrence in cooling effect. this is wht we called forced air cooling. if we suck the air out, heat at the processor will not be reduced that much but in overall machine does.

if got both in and out,then good la...and for HZ428..did u ever seen a 80mm casing fan attached to the front panel on desktop cpu?its to suck air in. and below laptop,there is a small fan to suck air in too.

and why is the fan always at the lower part? and the other at the upper part? well..air tends to go upwards when heated..so cooler air will be at the bottom,thats y the fan that blows air in is always at the bottom.and the one suck air out is at the higher part.


btw, laptop coolers are abit conflict with the concept..maybe because of the dirt particles restriction problem. the upper and lower fan is both sucking air out...and all round the laptop no holes for air to go in...doesn sounds right ...got air out,no air in. therefore laptop coolers do help abit..but not too much due to this conflict in airflow thing.

This post has been edited by bobbychin: Mar 22 2007, 06:49 AM

why do we blow air in to the laptop?easy..coz the cooling effect is better than sucking them out.

same like trying to blow towards a cup of hot coffee to cool it down.you wont suck the air rite?

when you blow air in to cool something,make sure they have enough empty space for the air to circulate and also a suitable exhaust area...cant just keep on blowing air into an enclosed place,heat wont be released.

This post has been edited by bobbychin: Mar 30 2007, 07:01 PM

i thought all laptops got vents at the bottom?other than the one cooling the CPU. i see mine got quite some vents..can see a heatsink inside oso..maybe the motherboard's heatsink.

hot sure whats the heatsink for..but from what i see in my desktop,motherboard,there is a heatsink on it. a smaller heatsink compared to the 1 for CPU.maybe to cool down some motherboard stuffs la.

yup,i say mine got vents for Ram,HDD, and a few more here and there.

if got vents,then suck the air lo..if no vents at all,then blow...coz dust wont go in ma.

i'm using twinhead ifio121..the heatsink is near to the RAM,but not directly on the RAm la,beside...maybe its for the north-south bridge thing la..i dont know..

when i started to use this laptop,ialways got heating problems..now,not anymore..cpu temp. stabled at 44degrees all the time
and hard disk below 40 if not on heavy downloading.

i think its because i use the "minimal power management" option,so the cpu goes slow when i not using much power,can save electricity and less heating problem.