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Do I need to reaply thermal paste if I remove waterblock?

TheMidnightNarwhal
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So ima have to remove h100i for cleaning and I don't have any other thermal paste with me so can I just unscrew and screw it back on without temp problems or reducing?

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So ima have to remove h100i for cleaning and I don't have any other thermal paste with me so can I just unscrew and screw it back on without temp problems or reducing?

You will need to clean off the old thermal paste from the CPU and block and re-apply.

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Not only reapply, but clean off the previous thermal paste as well.

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yea, you will get pretty bad temps if you dont.

I currently just switched my heatsink from one board to another(it has only been on the other board for a week or so)without reapply paste, and I'm getting pretty bad temps, I have no other option though as I have no spare TIM ;(

my temps are like 60C on all cores at 50% load on an i5 4670k D:

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Clean the old paste from both the CPU and waterblock, then reapply new thermal paste.

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yea, you will get pretty bad temps if you dont.

I currently just switched my heatsink from one board to another(it has only been on the other board for a week or so)without reapply paste, and I'm getting pretty bad temps, I have no other option though as I have no spare TIM ;(

my temps are like 60C on all cores at 50% load on an i5 4670k D:

Not only reapply, but clean off the previous thermal paste as well.

You will need to clean off the old thermal paste from the CPU and block and re-apply.

Welp I guess I won't be trying to install my I/O shield.

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You will need to clean off the old thermal paste from the CPU and block and re-apply.

False. So long as you don't touch the paste or let it touch anything else (putting the thing paste side down on a table, etc.) then you don't need to reapply it.

.

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False. So long as you don't touch the paste or let it touch anything else (putting the thing paste side down on a table, etc.) then you don't need to reapply it.

Air bubbles will very likely be present if you don't apply fresh paste.

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Air bubbles will very likely be present if you don't apply fresh paste.

The pressure of the block against the heat spreader will push the air out, next reason?

.

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False. So long as you don't touch the paste or let it touch anything else (putting the thing paste side down on a table, etc.) then you don't need to reapply it.

Uhh, no. 

 

I took my friend's H80i out to clean it, after I took it out he found out he had no thermal paste to re-apply with, so put the cooler back on the CPU with existing thermal paste on the two (nothing touched the thermal paste during the process that it was out of the PC) and temps increased by over 10 degrees as a result.

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The pressure of the block against the heat spreader will push the air out, next reason?

Proof otherwise null and void.

 

Not to mention the H100i is infamous for poor contact.

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Proof otherwise null and void.

I don't have the means necessary to do that.  :mellow:

Uhh, no. 

 

I took my friend's H80i out to clean it, after I took it out he found out he had no thermal paste to re-apply with, so put the cooler back on the CPU with existing thermal paste on the two (nothing touched the thermal paste during the process that it was out of the PC) and temps increased by over 10 degrees as a result.

I've taken blocks on and off without having any adverse side effects, without changing the paste.

.

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I would definitely do it, it's not gonna cost you much and it will make sure you are getting proper temps. Just clean with 99% iso and put some new paste on.

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It is worth a try. It cannot kill the cpu, it will just run a little hotter if it got a problem.

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I would definitely do it, it's not gonna cost you much and it will make sure you are getting proper temps. Just clean with 99% iso and put some new paste on.

 

Yeah I would it's just I don't have some with me right now and can't order stuff.

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False. So long as you don't touch the paste or let it touch anything else (putting the thing paste side down on a table, etc.) then you don't need to reapply it.

Absolute rubbish.

It is not acceptable technique,you must always remove and reapply TIM.

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False. So long as you don't touch the paste or let it touch anything else (putting the thing paste side down on a table, etc.) then you don't need to reapply it.

The pressure of the block against the heat spreader will push the air out, next reason?

 

False. The viscosity of most thermal pastes will trap air bubbles, even with the pressure of the block against the heat spreader. Air compresses very well, you will trap air bubbles. This isn't a problem with a fresh application, because you have TIM on 1 component, typically in a small dot in the center. As the TIM is squeezed and flattened it pushes the air out of the sides of the gap between the cooler and the heat spreader. When you have paste that is already spread out on both components, like you would have in a heat sink re-installation without removing the TIM, the TIM itself will end up making a partial seals before the cooler is completely pressured. Those partial seals are going to trap air, which will compress instead of get released and typically cause worse temperatures.

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Why wouldn't you just clean off the old stuff, you could pretty much go pick some up or order some for peanuts, I'd never fail to clean and replace TIM because not doing so is simply silly.

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Why wouldn't you just clean off the old stuff, you could pretty much go pick some up or order some for peanuts, I'd never fail to clean and replace TIM because not doing so is simply silly.

 

Yeah, it's just I can't go buy anything right now.

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Yeah, it's just I can't go buy anything right now.

I feel you, I need to replace my coolant and tubing but cant until January, ask some members here if they could spare some?

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I feel you, I need to replace my coolant and tubing but cant until January, ask some members here if they could spare some?

 

Meh, I guess cleaning and putting my I/O shield can wait.

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Surely someone could mail you some? Ask around, I'd send you some if I had some.  :)

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Surely someone could mail you some? Ask around, I'd send you some if I had some.  :)

 

Well I mean, who would pay to ship some thermal paste... I will ask a I guess... ha ha.

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Well I mean, who would pay to ship some thermal paste... I will ask a I guess... ha ha.

Honestly if I had a tube full or partially, you would be more than welcome to it buddy but I have none lol.  :)

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Well I mean, who would pay to ship some thermal paste... I will ask a I guess... ha ha.

Asking for goods is against the forum's CoC.

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