Subject: Heatsink Gap
By: Turtle (IP: 203.75.143.*)
Written on: 11-08-2006 07:44

there's a heatsink gap between the cpu and the heatsink. the cooling it does is terrible. it can't come in contact, and i'm thinking:

should i replace the thermal putty with artic silver 5? will the performance be better even though the application thickness will be about the same thickness as the thermal putty?

i can't replace the heatsink, just to let you know.

so, is artic silver 5 better even in the same thickness as thermal putty?
(thickness, about 4 mm?)

By: Tillmann (IP: 146.140.7.*)
Written on: 11-08-2006 11:17


I don't believe that the gap between CPU and heatsink is actually that big. Keep in mind that with many CPUs (esp. AMD Socket A processors) only the small die in the center of the CPU should be in contact with the heatsink, NOT the ceramic/organic plate around it. So if you look at the CPU with the heatsink installed, it might appear to you as if there was a gap, when in fact there isn't any.

By: Turtle (IP: 203.75.143.*)
Written on: 12-08-2006 08:39

thanks for the reply, but i'm serious, there is a good gap between the cpu and the heatsink, enough to force my fingernail in if it's long enough. the computer is a notebook computer BTW.

the socket for the screws for the heatsink is higher than the cpu itself, so even when it's screwed as tightly as possible, it still has that stinking gap.

all i want to kno is: does the artic silver 5 work well even in thermal pad thickness?

By: jimmy (IP: 203.145.159.*)
Written on: 13-08-2006 17:46

i'm given a project on PC cooling using heat pipes. please tell me something about it. i'm an engineering student. tell me about its temperature range/ fluid that can be used.
please .
By: Tillmann (IP: 146.140.7.*)
Written on: 16-08-2006 15:50


no - it is too liquid; it will drip away.

By: Ray (IP: 84.65.117.*)
Written on: 03-10-2006 03:44

With the GREATEST respect to all concerned ...

If there is an air gap between the CPU & heatsink when fitted, we should not be talking about thermal compounds AT ALL, (least of all the flow properties of Super Compound "X" vs Super Compound "Y" .

The problem is clearly physical and so a mechanical solution is required.

#Turtle# says "the socket for the screws for the heatsink is higher than the cpu itself".

I'm not 100% sure what that means but it seems clear that the socket is too tall. So, either remove material from the socket to ensure that the heatsink rests on the CPU, or (easier) recess the heatsink so that it clears the socket.

HTH, Ray
(It's like asking why is my shoe too big then looking for a designer sock to solve the problem!)
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