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Bent fins on CPU heatsink

This is a discussion on Bent fins on CPU heatsink within the Cases and Cooling forums, part of the Tech Support Forum category. I was just moving my Hyper 212 Plus from my old CPU/motherboard to my new one and I happened to


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Old 05-07-2020, 01:03 PM   #1
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I was just moving my Hyper 212 Plus from my old CPU/motherboard to my new one and I happened to notice that the fins on the heat sink were bent - to the point that they were touching each other (see pic). (Whether this happened before or after my old CPU/motherboard went kablooie and could be the cause of it, I don't know.)

Is it OK for me to bend the fins back or should I get it replaced?
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Old 05-07-2020, 01:37 PM   #2
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Straighten them up, all that will effect is air flow.
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Old 05-07-2020, 01:58 PM   #3
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You definitely do not need to get it replaced. And frankly, the damage is not bad at all and I would be really surprised if it affects cooling efficiency, even a tiny bit.

The only real reason I can see for worrying about it is where pinched together, it might start acting as a small dam and might start collecting and building up a nice collection of dust that might start to affect air flow enough that it might then start affecting cooling. That's a lot of "mights" that need to come into play - and if your case is filtered, it probably would take quite awhile to happen.

I would use your fingernail or one of those wooden cuticle stick pushy thingys - something you can get in between the fins without scratching them.
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Old 05-07-2020, 02:04 PM   #4
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It's the same on other cooling devices i.e air conditioner compressors or car radiator cores. Letting in more air by bending fixes the problem.
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Old 05-07-2020, 02:35 PM   #5
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Thanks everyone. Not knowing how these heatsinks work, I was afraid the fins touching each other helped conduct heat and would cause the CPU to overheat. (I'm still looking for reasons why my old CPU and/or motherboard stopped working).
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Old 05-07-2020, 02:52 PM   #6
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Quote:
I was afraid the fins touching each other helped conduct heat and would cause the CPU to overheat.
Actually, a bunch of touching fins would cause the heatsink to retain heat, not conduct it. But in your case, that was only a small number and area affected. And it was about as far away from the CPU (heat source) as possible. Not to mention it is a monster cooler in the first place. So no worries.
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Old 05-13-2020, 06:10 AM   #7
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FYI...
People who service air conditioning units have simple comb-like tools that fix this problem easily. It is a simple thing so I expect it would be cheap.
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