6324W Cooling question

Does anyone know how the air is supposed to flow through the 6324W? I know the keyboard is ventilated and that there is a small plastic sheet situated above the fan, but how is the air "supposed" to get to the fan? is it just through the vents on the bottom with a little through the small gap between the fan and keyboard and between the fan and bottom case? If the only way the air gets into the fan is via these small vent then it is no wonder the GPU gets sooo hot after a while. I do not want to just remove this plastic sheet from the keyboard as I may cause a problem elsewhere with the air not being drawn through the case. It's just a thought but it may be the answer to all our high temperature problems. Including the stuttering when it gets too hot.

 

As far as i know the air gets in via the keyboard and trought the vents on the bottom of the computer.

I got about 100 C while maxing out and also get the stuttering after some time of gaming, and as i understand it via Nvidias monitoring devices the GPU clocks down itself to 168/100MHz to lower the heat. I got the laptop tilted up to get in more air under it.

 

I see the same problems with regard to the GPU downclocking when it gets too hot. I think the air going through the keyboard is limited by the fact that Zepto have fitted a thin sheet of plastic in the top left corner that covers the fan's upper inlet. All other notebook's I have looked at have a clear opening for the fan, only this one has an obscured entry. I think this may be why Dell users with the same GPU don't get as hot. I am worried though that removing the plastic will lead to a rise in temperature elsewhere within the notebook as it will mean the fan gets its air easily through the keyboard. Maybe I need to remove the keyboard and see how the air goes by allowing smoke to enter the PC via the vents supplied (replace keyboard with clear plastic sheet temporarily so I can watch how the air moves) I'd rather not do this as its a monumental pain in the arse. Hence the reason for asking if anyone knows how it flows through the case.

 

i think that's an interesting theory andy, you should definetly try it out

 

Well what Iv understood of the 6625 wich also takes the air trough the keyboard is that the air goes from the holes between the buttons trough the metal plate that supports the keyboard, then into the fan and trough a heatsink wich both CPU and GPU are connected to and then out of the case on the left.

(I bought a laptopcooler 2 days ago, and so far it has really helped the cooling system while gaming, temps are 5 or more degrees lower when I have it turned on)

 

Do you know if the keyboard on the 6625 also has a piece of plastic stuck to the underside directly over the fan? If this is fitted by design that would explain why the GPU gets so hot, as the fan cannot get a good source of air meaning it will not be as effective. The gap between the bottom of the keyboard and the GPU heatsink plate that sits on the fan is only 1.8-2mm. This is a tortuous route for the air to take and as such probably won't work as well. I wonder if this is done to maintain a lower temp overall for the notebook as the air is being sucked in mainly from below the fan, across the motherboard via the vents on the underside and front of the notebook.

 

Well I've tried removing the plastic sheet fitted to the underside of the keyboard. Good news is that my GPU temps max out at 88C as opposed to 95C, and my CPU max's out at 70C instead of 82C. Very good improvement for just removing a piece of plastic stuck to the keyboard. Bad news is that the area either side of the touchpad is getting a very warm. I wonder what the hell is under there that could cause this. This heating up is a major concern as I cannot see what is fitted here without completely removing the palmrest. These temperatures were taken after a good 3/4hr gaming. I will have to see if I can get a look under this section by some means. (maybe take the camera out of an old webcam and stuff it in there, don't know yet)

 

THe 6625 dont have any plastic piece that you displained but it has a metal plate with a round hole as big as the fan. Why? No idea, maby to limit the air from being pulled from omewhere else than trough the keyboard

 

The HDD is under the palmrest on the right side of the touchpad. The ExpressCard slot is under the left palmrest. You could try removing the plastic filler from the slot and see if that lets a little heat out. I see there is a small air vent on the front side of the chassis below the touchpad.

You could also try the compromise of a half-sized piece of plastic under the keyboard above the fan to give an in between cooling airflow.

John

 

John, The heat seems to be coming from the touchpad itself. the harddrive only gets to a max 45C during gaming. The increase in temp was with the plastic express card filler removed. I think I will try a smaller plastic sheet under the keyboard as you suggest.

 

Is there any photos available so we can take a clear look.

I have the same problem with my 6224w

 

I attach an old photo for my 6024W keyboard. I don't remember noticing the plastic sheet but it seems to be there (in the bottom left corner of the photo).

I can understand the logic behind stopping the airflow direct to the fan: There is a need to get some cooling air flowing through the computer to keep the rest of the hardware at a comfortable temperature. However, if those flow paths are too constricted then the fan is starved of enough air.

I don't know what is producing the heat under the touchpad but it could something on the mainboard which I assume occupies the how of the chassis left of the HDD and ODD.

John

 

How i can remove my keyboard too?

 

Seek and ye shall find.

Be forewarned that removing the keyboard may invalidate the warranty should you damage anything.

John

 

Managed to open it..
Too much dust inside...

So now it seems to be cooler

Is it easy to remove the heatsink from the cpu?

 

Good news. Notebook designers usually forget that their products can act like vacuum cleaners and they end up like this photo in the Samsung forum.

I've not touched my heatsink but I understand that removal is reasonably easy. However, don't touch remove your heatsink unless (i) you have reason to believe that the thermal connection between CPU / GPU and heatsink is poor (there were reports of excessively thick thermal compound a few months back) and you have your own thermal compound (Arctic silver or similar) and know how to apply it. An indicator or poor thermal connection would be high fan activity but the air is fairly cool.

John

 

Still trying to get a happy medium between cooling the GPU and keeping the rest of the notebook cool. I think I need to see what else is inside the notebook before I decide how best to cool it down, or how to get better airflow through the laptop. Looks like I'm going to be completely stripping it down. (unless some one out there has photos of the insides of these notebooks-or knows where to find service manuals).

 

I have a 6314, and from pictures I have seen, the heatsinks looks identical. If you are able to take the top-casing off, it is probably very easy. However it can be done without taking the whole thing apart. I took out most of the screws holding the laptop together, as I initially didn't know how to go bout it, so perhaps only the ones in the fan side is necessary. Just keep track of the screws, if I remember correctly, most of them are the same size but one was slightly longer. Once the screws are out you can, while gently holding the top and bottom at the fan outlet apart and with a little twisting inward and tilting upward, take the heatsink out. A little force was necessary, but not to a degree were I was affraid to break something.

Check the plate on the heatsink going on top of the GPU, and see that it is properly leveled. Mine was so ill-fitted and ill-soldered that my favourite 3D screensaver could only run for 5 min or so, before the GPU overheated and the laptop suddenly shut down. After resoldering and trying to bend it to a better fit, max temp. on the GPU, that I have seen, has been about 85 degree celsius. Whereas before I have seen it go beyond 100. Not sure what the shutdown temperature is.
I resoldered my heatsink on my stove, but I am not sure if I can recommend that. Perhaps removing the rather excessive amount of cooling paste would have been enough.


About the tape on the backside of the keyboard above the fan. My guess would be that the purpose is to force air past the top surface of the fan, that is the copperplating part of the heatsink to the GPU, instead of just directly into the fan. Otherwise the GPU-heatsink seems to only have a small strip of copperplate in front of the fan to give off heat.


Photos:
Cooling paste ala wtf.

Heatsink soldering at medium heat.

 

Mine too was ill-fitted, not sure about the soldering though. What part did you resolder? The GPU end or the fan end?.
I'm not so sure the tape is there to force the air over the plate, more to restrict the air from being pulled from above and force more air to be pulled in through the front of the notebook. When I remove the tape I get lower GPU and CPU temperatures, but the front of my notebook gets hotter, specifically under the touchpad.

 

I soldered both ends, and a little here and there while I was at it.
At the GPU end any soldertin wasn't directly visible, so the soldered contact surface could have been small. At the fan end the small grill was only attached in the middle.
I can't say how much the resoldering contributed to the improvement, as it was only one of the things I perceived as a problem and tried to fix.

If you have fixed everything else and are still having a problem, then perhaps Zepto would be kind enough to give you a replacement heatsink, to see if it makes a difference. They ought to be interested in resolving such issues.

Yeah, that makes more sense.
Mine gets a little warm there too. Perhaps the northbridge sits under there.

 

I'll look into soldering the heatink later today. See if that makes any difference. I'm not too sure how Zepto would react to me asking for a replacement heatsink assembly. I'm seriously considering taking the whole thing apart to find out why the area under the touchpad gets so warm. Don't really want to, but there doesn't seem to be anyone else thats done it who has got pictures of the insides of their notebook (at least no one thats posted here anyway).

 

anyone checked the air-temperature of the exhaust on the left side? i am asking that, because i think my GPU heatpipe is illfitted. the cooler runs on highspeed, GPU temp is >95 C, and the air on the left of the notebook is rougly at 45 C. shouldn't that be higher?

 

Compared to mine(6314) it sounds much too low, that is if the machine is under heavy load. But at any rate, as far as I know, from what I have read from other people, as far as they knew, GPU temp above 95 C is not nice.

I have a brother with an 6224. He only briefly monitored the temperatures, but in that time he says it never got over 90. And that is consistent with my experience, after I had mine fixed. As far as I know they (6x14 and 6x24) are comparable in that respect. So yours should be able to do better as well. You would have to ask a Zepto rep. whether your values are "by design" within acceptable limits.

I took two readings on my 6314, one under light load and one under heavy load. Ambient temperature was about 20C. Temp. probe stuck 1-2mm inside the vent, adjacent to the top edge of the caps-lock. You probably can't compare values directly, unless you make measurements under same conditions.

CPU - GPU - Exhaust Air
54 - 57 - 49
91 - 86 - 76

 

Im tired of the chassis getting so hot. Especially the chassis above the PCMCIA port (express card port).

I have tried some things, but nothing works. I have dissasembled almost the whole 6324W. The chassis above the PCMCIA port is always HOT! I think it might be because the CPU is so close, but I dont know. I also know that the bottom chassis under the PCMCIA gets very hot.

Here's what I have tried to get a cool chassis (I have attached some pics):
1. Removed the metalplate to the PCMCIA port because I have noticed that it gets very hot. However this had no effect on the hot chassis.

2. Removed the metalplate that stiffens up the chassis. This had no effect on the hot chassis. I also noticed that this part is not needed, the chassis is still stiff.

3. I have tried to put some heatshielding material (usually used in cars) under the chassis above the PCMCIA port. NO EFFECT!

4. I had a crazy idea that it would work to put a small fan under the chassis. So I made a small USB fan from an old dell inspiron 8200 fan. It did fit when I removed the metalplates. The fan was working, but it was very noisy(!) and it made no difference in temp. I think it's because it was only blowing hot air up to the chassis.

I dont have any problems with the CPU or the GPU overheating though. I'm using OCZ freeze instead of AS5, I think it works a little better. It's working good at once, and AS5 need many hours before it's working good.

I have no ideas what to do to get rid of the heat. My Znote 6615WD doesn't have any problems with heat, except that it gets a little hot on the bottom. Anyone know what to do?!

 

i *think* it will be more effective to take out the black plates under the motherboard (behind the vents) as the notebook seems to suck air through the whole notebook (partly, some from the keyboard, the rest from below). i dont know why those black plates are installed (maybe to protect the motherboard from small particles). sadly my 6324 is still under warranty, so i cannot/will not disassemble it.

 

How about make a few ventilation holes so that a small amount of air gets sucked through the area under the PC card slot to the cooling fan?

John