[SOLVED] heat pipe too long

Solution
You were cutting it close with 158/158mm.

If the single heat pipe length is abnormally long, you could try to exchange the cooler as defective.
I would try that first.

If you want to try to fix things yourself, carefully apply pressure to the cooler to bend the pipes to make room. You run the risk that you may damage the cooler.
But, heat pipes do bend a bit and I think if you pushed down on the whole cooler, you might gain 1mm out of it. I have done this successfully with a different noctua cooler to effect ram clearance.
You were cutting it close with 158/158mm.

If the single heat pipe length is abnormally long, you could try to exchange the cooler as defective.
I would try that first.

If you want to try to fix things yourself, carefully apply pressure to the cooler to bend the pipes to make room. You run the risk that you may damage the cooler.
But, heat pipes do bend a bit and I think if you pushed down on the whole cooler, you might gain 1mm out of it. I have done this successfully with a different noctua cooler to effect ram clearance.
 
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Solution
I tried to grind down a heatpipe on a cooler that I had no use for. You can only grind surprisingly little off the end of a heatpipe, before you reach the hollow core, and the cooling fluid immediately evaporates.

I managed to grind down roughly 1 mm, before the core was breached. I have attached a picture of the cooler which shows the heatpipe after I cut away the tip, maybe you can use it for reference.

As you can see the heatpipe wall is thinner on one side, so it's hard to predict how much you can grind away

EDIT : The heatpipe appear a bit thicker in the image because it is a close up, but roughly 1 mm to work with where the pipe wall is thickest.

Mx7QGyB.jpg



In your case I would be very hesitant to begin grinding down the heatpipe, as you gain very little and risk damaging the cooler instead.
 
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I tried to grind down a heatpipe on a cooler that I had no use for. You can only grind surprisingly little off the end of a heatpipe, before you reach the hollow core, and the cooling fluid immediately evaporates.

I managed to grind down roughly 1 mm, before the core was breached. I have attached a picture of the cooler which shows the heatpipe after I cut away the tip, maybe you can use it for reference.

As you can see the heatpipe wall is thinner on one side, so it's hard to predict how much you can grind away

EDIT : The heatpipe appear a bit thicker in the image because it is a close up, but roughly 1 mm to work with where the pipe wall is thickest.

Mx7QGyB.jpg



In your case I would be very hesitant to begin grinding down the heatpipe, as you gain very little and risk damaging the cooler instead.
That just killed about 25% of cooling capacity.
 
Things like that is the reason I skip over air coolers whose height matches that of the chassis' stated air cooler clearance, and instead look to models that are at least 1mm shorter, when recommending air coolers to other people.
If you turned the screws securing the cooler to the cpu all the way - when they stop, then that's it. I'd suggest not trying to tighten them any further.
I'd also suggest returning that cooler for something a little shorter.

@MadsModsat
All in the name of science!
 
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That just killed about 25% of cooling capacity.

Yes, you are completely right about that, and I also suspect that the GPU would be hotter on one side than the other.

But it is a cooler I no longer have any use for, and I was interested in finding out how quickly the liquid in heatpipes evaporate when the pipes are damaged. I was also curious about how thick the pipe walls are. It was never supposed to function as a cooler again, and luckily I had all my questions answered when I cut the cooler open :)