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Discussion Starter · #1 ·
Hi-

I just got the H80i and replacing my long time Noctua D14, before swapping the cooler, i did a prime 95 test and record the temp for this D14. running the test torture test for 22 minutes and RealTemp.exe report 71, 76, 77, 73. so i go on to replace the cooler with h80i and i used AC5 and put a pea size amount on the center of the i7 2600k. of course i removed the old AC5 paste from the 2600k cpu and also the thermal paste on the heatsink of the stock h80i. putting everything together and i boot it at 2600k @4.4ghz 1.485v in bios of msi p67a gd65 mobo. i ran the prime p64v266 (if i use p64v279 version the system freeze, why?) and the temp reach around 98-94-91-88. which is insane differences from the noctua. i know that the noctua d14 do perform better but not this far away.

so what could be causing this high temp?

how firm do i need to tighten the corsair heatsink?

am i using not enough AC5?

or any other reasons please help!!

thanks you!!!
 

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Your pump is not sitting flush to the CPU. You are going to need to re-mount the pump and add washers to the backplate. Pick up 8: #8 Nylon washers and put them between the backplate and the board. We put 2 washers per stand off to get the pump flush to the CPU. Your temps will drop drastically after they are added.
 

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A pea sized amount of thermal paste is probably a bit too much. it is generally accepted that you want it to be about the size of a grain of rice. Thermal compound is not meant to be a layer between the CPU and heat sync. It is meant to fill in the tiny gap caused by the porous/not perfectly flat surface of the CPU. If you take off the water block you will likely find that you have Thermal paste that has squeezed out the edges of the block. Using too much thermal paste can easily cause bad temps. As far as tightening the water block, tighten it as far as you reasonably can. There is a strong metal bracket on the back of the motherboard which spreads the load and prevents you from breaking anything.
 

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Quote:
Originally Posted by Enialius View Post

A pea sized amount of thermal paste is probably a bit too much. it is generally accepted that you want it to be about the size of a grain of rice. Thermal compound is not meant to be a layer between the CPU and heat sync. It is meant to fill in the tiny gap caused by the porous/not perfectly flat surface of the CPU. If you take off the water block you will likely find that you have Thermal paste that has squeezed out the edges of the block. Using too much thermal paste can easily cause bad temps. As far as tightening the water block, tighten it as far as you reasonably can. There is a strong metal bracket on the back of the motherboard which spreads the load and prevents you from breaking anything.
Not always, my IC diamond requires a larger amount.
 

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Sounds like a bad mount. As per the TIM application I always manually spread it myself with a rubber glove so I know its a good even amount. But to each is to own.

Sent from my SCH-I545 using Tapatalk 2
 

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Quote:
Originally Posted by Watagump View Post

Not always, my IC diamond requires a larger amount.
This may be true as I have never used IC Diamond however the OP uses AC5 which I use exclusively. A little bit goes a long way. If it takes much more than a tiny amount of AC5 to fill the gap then you have not put the block on tight enough or you have an extremely out of plane CPU cover. As I stated earlier, the goal is not to have a layer between your CPU and block because even the best thermal paste does not have the thermal conductivity of metal to metal contact therefor you want to allow as much metal to metal contact of the CPU and block and fill in the tiny amounts of porosity with the thermal paste. If you use too much, you loose your metal to metal contact and instead have metal to thermal compound to metal contact. This is not considered optimal.
 

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Discussion Starter · #8 ·
Quote:
Originally Posted by aHumanBeing View Post

Your pump is not sitting flush to the CPU. You are going to need to re-mount the pump and add washers to the backplate. Pick up 8: #8 Nylon washers and put them between the backplate and the board. We put 2 washers per stand off to get the pump flush to the CPU. Your temps will drop drastically after they are added.
i only got 4 washers from the bag. i know it like i am missing 4. according to the manual i should get 8 washers. according to the manual they didnt say to add any washer between the backplate and the motherboard. they indicate that the washers is used for the two fans to prevent vibrations i guess. should i go buy more washers? maybe at home depot? thanks, please give me more suggestions!
 

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Good advice above...just to add check that the H80i block isn't resting on any of the capacitors near the CPU socket. If this is the case, it prevents the block from fully contacting the CPU. In most cases the caps are far enough away so it's not a problem, but it's been known to happen on some motherboards.
smile.gif
 

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Quote:
Originally Posted by tainle View Post

i only got 4 washers from the bag. i know it like i am missing 4. according to the manual i should get 8 washers. according to the manual they didnt say to add any washer between the backplate and the motherboard. they indicate that the washers is used for the two fans to prevent vibrations i guess. should i go buy more washers? maybe at home depot? thanks, please give me more suggestions!
They don't seem to include the right stand offs so nylon washers need to be used. The H80i that we installed using a 3770k and a 2600k and 3 different boards required nylon washers on the backplate. It seems to be a common problem that the H80i won't make correct contact.

yes you should go pick some up from home depot and try it out.
 

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Quote:
Originally Posted by Enialius View Post

This may be true as I have never used IC Diamond however the OP uses AC5 which I use exclusively. A little bit goes a long way. If it takes much more than a tiny amount of AC5 to fill the gap then you have not put the block on tight enough or you have an extremely out of plane CPU cover. As I stated earlier, the goal is not to have a layer between your CPU and block because even the best thermal paste does not have the thermal conductivity of metal to metal contact therefor you want to allow as much metal to metal contact of the CPU and block and fill in the tiny amounts of porosity with the thermal paste. If you use too much, you loose your metal to metal contact and instead have metal to thermal compound to metal contact. This is not considered optimal.
IC Diamond was the first stuff I bought that the directions said to use a larger amount then what I was use to. Might have to do with it being a bit thicker than other TIM's.
 

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Discussion Starter · #13 ·
i added washers to the backplate, redo the thermal paste and reseat the heat sink and my temp after running prime95 torture test for 19 minutes. temp is 64-67-66-65. which is lower than the noctua d14 but i also believe that the sitting wasn't that flush for the noctua but acceptable. i think the reseat of the heatsink was the key here, since when i first put it on and screw it down, i did not pay attention to the strenght of the two water tubes that pushing the heatsink to the far right...


thanks for the help all...just uploading some pix to see my setup.
 

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This is a necro but:


I'm using the nylon washers as pictured above (supplied with the Asus mITX boards), but my H80i is still getting very poor contact with the CPU IHS. I'll take a picture when I reseat it (or toss it) this weekend but the NT-H1 paste is still opaque grey after removal and the usual grain-size application is insufficient (I have to put a line down the IHS to prevent idle temps from reaching 70s).

With my 4790k it idles 30'C but quickly reaches 85-90'C on full load (IBT and P95 27.x Small FFT)... this is at stock clocks with a maximum voltage of 1.12v.

Not sure how thick the incremental distance required from the washers would be but it would seem in my case the ~1mm provided by 4 single washers is insufficient.

Corsair's mounting system is abysmal.
 
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