What kind of thermal compound is that ?

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zhyrclew

Mar 20, 2018
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Hi, here is the stock thermal compound used on the graphics card of my laptop (Asus G75VX - GTX 670MX)
2c09b1c4e9.jpg

I've already wiped the thermal paste used on the GPU itself, but I dunno what kind of thermal compound I would need to replace the one you can see in the picture, because it's not thermal pads as I was expecting, but it's way thicker than the thermal paste I have.

Here is the PCB side :
9f59bd5f7d.jpg
 
Solution
COLGeek
You could do thermal pads for those items that seem to be barely touched (looks like memory chips for the most part). Heck you could do for all of those touch points.

Also, when reattaching the heatsink, make sure to tighten it securely. That could have been part of the reason some areas look to have had less contact than others.
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zhyrclew

Mar 20, 2018
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Okay, thanks.
I don't know if you've seen, the stock thermal compound barely touched some of the components (left), so I will need to put quite a lot of thermal paste.
As the stock thermal paste is, and as the logic would want to, if I need to have 1-2mm thick of thermal paste between the components and the heat spreader, shall I have an unusually thick (high viscosity) thermal paste?

Also, the main line of arctic silver, the arctic silver 5, is noted to be slightly capacitive. As you can see on the right of the pictures, if I apply the thermal paste the same way the stock one has been applied, quite a large amount of the thermal paste will be directly onto contacts of the PCB. I don't think it is recommended.

So, I hope I can put a thermal paste on it, but I wonder which one exactly, and I wonder if thermal pads wouldn't be more reasonable.
I've also heard of putting little copper pads in the gaps, with thermal paste over and under, if anyone has experience with that...
 
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COLGeek

COLGeek

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You could do thermal pads for those items that seem to be barely touched (looks like memory chips for the most part). Heck you could do for all of those touch points.

Also, when reattaching the heatsink, make sure to tighten it securely. That could have been part of the reason some areas look to have had less contact than others.
 
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Solution
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zhyrclew

Mar 20, 2018
3
0
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Yeah, it seemed like all the screws had been well tightened, but i'll be carefull with that, maybe over-bend a little the aluminum brackets, because they act like springs.

If I try thermal paste, you would still recommand the arctic silver 5 for this application ?
 
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