Pushing Air UNDER or Pushing Air UP?

Recently I just bought a Spire Pacific Breeze laptop cooler and I guess I'm content with it.

It pushes a good amount of cool air under my laptop and out toward the sides.

Then lately, I've been wondering whether a cooler that pushes air UP towards the bottom of the laptop would be more effective in cooling the laptop itself then a cooler that pushes cool air underneath it.

Coolers like the Zalman ZM-NC1000 pushes air UP.

Then again, I've read some reviews that have said the Spire Pacific Breeze does a tremendous job in cooling a laptop.

I know that how much a cooler cools the laptop certainly depends on the kind of laptop and how the vents are situated.

In this case, Vaios have their vents on the bottom.

So my question is, does a cooler that pushes air UP do a better job of cooling then a cooler that pushes air UNDERneath the laptop?

 

I have an antec notebook cooler and it pulls air away from the bottom and out the front and right side. Like you mention above, I matched the exhaust ports of the laptop equal to the intake ports of the cooler. The reason I did this is because pushing air into the laptop is also pushing dust in there as well. It will still get dust in it naturally but I feel that my config doesn't add to the problem.

 

Yeah dust does accumulate in the laptop over time naturally...

Btw nice avy.

 

Thanks. Just made it this morning...