What Thermal Pads?

danA320

danA320

danA320

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22 Oct 2010
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Location
Warwickshire
Can anyone suggest the most suitable pads to get to secure my graphics card to the heat sink. As you can see in the picture below, its quite a big gap - I have been looking around online but not sure what size to get. Does it matter if i double up the pads to fill the gap?

I was thinking of using these however it might be too thin... http://www.overclockers.co.uk/showproduct.php?prodid=TH-001-AK

Here is a pic.....

dsc02591q.jpg
 
Err, the heatsink should be touching the processor anyway you shouldn't be using thermal pads to 'fill in the gap'. My advice would be to either fit your HSF to the video card correctly or buy a compatible one because whatever you're doing isn't working and if you try to run that as it is it will crash within 30 seconds.
 
thats a standard heat sink on a standard motherboard. The CPU has a direct fit however this is the graphics card in the picture. What a silly deisgn by HP!
 
You can purchase thermal pads up to 5mm thick but I have never seen anything with as big a gap as you have.
Are you sure that its mounted correctly?
 
ok thanks for the replies that picture was taken with the heat sink not completely screwed down. Ill try it later on screwed down and get a picture.
 
Is this a laptop? BTW I wouldn't be happy using any kind of thermal pad with a gpu core, I would use TIM only. There is somthing wrong here.
 
I have screwed down the heat sink fully and the gap is a lot smaller now - sorry for the confusion. The gap now is around 1-2 mm between the GPU and the heat sink - here is a picture below. Will thermal paste be sufficient or will i need to use thermal pads. Thanks for the replies...

dsc026211.jpg
 
I just measured the gap and its 0.406mm all screwed down - cant believe HP just put a thermal pad in between it. Is this too much of a gap for thermal paste?
 
I think you need to explain just a bit more what the chuffing heck it is your're doing here. What card is that? What cooler is that? Is the cooler designed for whatever that thing is in the first place, etc. The last question is the critical one.
 
Its an NVidia chip with the standard HP heat sink attatched to it. The moterboard is a standard HP DV2500 series motherboard. I took the motherboad out to replace the fan and have found that all HP have used is a ****ty thermal pad to fill the gap shown in the picture. I cant find the pads anywhere and Im thinking of using a copper shim or just thermal paste before I can put the laptop back together again.
 
a shim with thermal paste, like i say, the paste is just to make a better contact between the heatsink and chip, if you have a gap, you need to fill that gap with conductive material, metal
 
As has been stated before, TIM is just used to fill the imperfections (micron scale) between two conductive surfaces. Some smooth copper plate is probably the best bet as it's the most thermally conductive metal available at a sensible price.
 
I have ordered a 25mm x 25 mm 0.5mm thick copper shim which should make a perfect fit between the heat sink and the GPU. I have also got some artic 5 thermal paste to use with this. Does this paste keep once opened in room temperature? Thanks for help
 
danA320 said:
I have ordered a 25mm x 25 mm 0.5mm thick copper shim which should make a perfect fit between the heat sink and the GPU. I have also got some artic 5 thermal paste to use with this. Does this paste keep once opened in room temperature? Thanks for help
Click to expand...

It keeps for years.
 
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