Potential method for mega heat loss

Hi there, Now this is a POSSIBLE heat loss method for when your gaming on your laptop.

I posted in this thread today about where the GPU was on my laptop for the greatest heat loss so the air blowing in could cool better.

Anyways long story short, I now have This case fan turned upside down under my laptop knocking off 13C when overclocked and 8C when stock clocks on the GPU and 4-7 degrees on my CPU.


I initially followed this cool guy's tutorial for wiring the fan together:

110CFM Laptop Cooler

But his laptop had a fan for the CPU and GPU, and he was making sure enough air got to them.

EDIT:
My idea is based on the laptop having one fan and a heatsink and using a case fan to suck the heat straight from the heatsink, so kind of the opposite. So depending on your laptop, you'll have a method to cool it down. Whiskeysix's method above if you have separate fans or this method for one fan... but only if it works!



I thought I'd post to see if anyone wanted to try this because if it works, it means laptop coolers suck because they don't suck, they blow! (all that for one joke, a bad one, but I like it)

Instructions are in the other threads 3rd post, please post back if anyone tries it. Oh yeah I have a Dell N5010 - a laptop known for heat issues, so any members with N5010's try it out and see if it helps even if you don't have heat issues.

regards Alex

 

He is pushing air into the vents on the bottom of the laptop, not the other way around...

Most laptop coolers work poorly because they don't move much air, and they don't direct it anywhere useful.

 

yeah, I read the article, I already know this, the reference to the article was purely for wiring the fan up to a generic plug. the rest of the article describes how blowing air into his fans dropped temps... I'm proposing sticking the fan underneath your laptop and SUCKING air out (placing it upside down) which removes up to 13C from MY temps with MY DELL N5010 while OC'd making it cooler when running OC'd by 5C's than when running stock clocks with no fan underneath. Put another way if you turned your laptop cooler upside down and placed your laptop on top of it, it would suck air out the bottom of your laptop which seems to work 3 times more effectively than when I had my fan blowing into the same vent on the bottom of my laptop.

that is all I am proposing, except with a powerful case fan - suck the air out instead of trying to cool down hot air with cool air, makes sense doesn't it?.

If its not a new idea, fine, but I have searched and googled for hours and not found anything like this... its cheaper to do and gets 3 times the heat loss. If it solves somebodies heat problems that saves alot of stress and money of losing work and buying a new laptop because their old one melted...

kind regards
alex


Edit: edited first post because the wording was wrong, which explains the reply I got, sorry I apologize, it should make more sense now.

 

There are a few users here who have realized similar benefits to using a powerful desktop fan underneath their laptop.

I forgot who posted it (i'm sure there were a few), but a user modded their desk to build a fan into the surface so that he could place any laptop on it and instantly reduce the heat. Fan is user replaceable if it goes bad (unlike most laptop coolers) and it will work for any laptop they get down the road (unlike heatsink mods or case internal case mods).

That pvc mod you posted is only useful for one specific fan size and location unfortunately.

 

its more the fact that the air is getting sucked out as opposed to blown in that I'm getting at, it seems to be far more effective and I've had 3 different coolers over the past two years that only blew air into my laptop. Are they're coolers that suck air out? even when looking at the design of my laptop blowing air into the bottom of it would provide cool air to the fan vent and so logically cool it down more than trying to suck air out from the bottom of it... but its actually hopeless at keeping it cool

It just seems that sucking the air out is far more effective than blowing air in, whether it be a 110CFM 120mm fan or 40mm 15CFM fan.

 

Yea, the problem with sucking air out is that you need to create some sort of vacuum around the vent in order to do it properly. Since nearly all laptops have seemingly proprietary fan and vent placement, you'd almost always need a custom solution.

Plus, most laptop fans are pulling air up the bottom, and blowing out the side/back, so if you're trying to suck air out of the bottom, you're working against the internal fans.

 

I fixed that problem by making sure there was no space between the fan and laptop, it works very well.

I think if I created a vacuum it would conflict with internal fans but because there isn't one - just having no space between fan and laptop seems to create enough vacuum for heat loss while not affecting the internal fan. on the n5010 the vents I'm talking about are the farthest away ones so lessening the chance of conflict with the internal fan as well.

I can post pics if you like of the way I've got it setup?

 

Sorry just re-read your post and I didn't know if you were talking about the vent where the internal fan takes in air or how the internal fan sucks air through the laptop. If you're talking about the vent where it takes air in, then there is no conflict - the fan is at the bottom of the laptop right under the mousepad and its only 120mm so the inernal fan vent has as much air as it needs to work.

If you are referring to the internal fans sucking the air through the designed air flow route of the laptop... then I don't know, could the external fan eventually break the internal fan due to the external fan pulling air through the laptop in the opposite direction, putting strain on the internal fan?

I think this thread is abandoned pretty much, but I've been experimenting more and turned the case fan up full to 2400rpm and it dropped another 4 degrees at max overclock, meaning in total a drop of 17 degrees! with results like that you can understand why I'm keeping this thread going.

in conclusion, the case fan in no way conflicts with the internal fan taking in air - it still takes in air the same as before. All I need to find out now is if the external fan possibly conflicts with the internal air flow design, possible eventually breaking my internal fan.

all replies are greatly appreciated, thank you!

EDIT: I posted initially for the benefit of n5010 as they are seen to have rubbish cooling, but it could possibly work for other laptops with some testing. 620/1070 clocks on a 5650m usually produce 75+C readings, I'm running at 61C, and if there are no ill effects to the fan, its by far the best solution to my heat issues, and right now the only one that works.

kind regards
alex

 

This was my main concern. If they air flow is now moving in a different direction than the original fan intended, it could be putting additional pressure on the internal fan and cause additional wear/burn out.

But if it's working more efficiently, then that's what matters.

 

Thanks waterwizard for putting up with all my questions you've been a great help. If my fan does eventually give out, I'll post back but right now I'm having too much fun with a 33% OC on the core and 25% OC on the mem with load temps like 63C to worry about the fan giving out, I should but Ah! the performance is so good!


thanks again! regards Alex

EDIT: I was actually building a modified version of the cooler in the tutorial(pvc air ducting instead of piping - much cheaper and more flexible as well as travel friendly) and I got the last part today(I was just playing with the fan until it arrived hence using the fan itself without any tubing). turned it on and at the fan doesn't even need to be turned half the way up and my temps are down to CPU: 55/52 and GPU same as above, if I turned it up anymore I think the fan would be overrun a little. but blowing air directly into the fan is actually far better, but a little more awkward and more hassle.

but no chance of overrunning the fan now, if anyone wants a quick run down of the modified version of the cooler post in this thread or PM me.

thanks again

 

hi alex2009 ,

I tested your way of cooling,and it worked.
I was wondering if you could take a picture from what u made and tell us how you made it to give us some ideas to make our own ? for example which vents you suck the air out ?

 

ya, images will help

 

This plan backfires for anyone who actually has a laptop, in their lap. The fan generally sucks from below (although it can probably grab air from a side vent or the inner ring opening which can grab air from inside the case) and blows it out through the heatpipe vents and out the back/side of the case.

Flipping this air flow will lead to some toasty balls as the hot air is expelled downwards (also heating any surface the laptop is on, as if this underside does not get hot enough) but the air could leak into the case as well.