CPU Running 90 Degrees and upwards not at full load (New Build)

Wadeyy

Commendable
Jan 5, 2017
2
0
1,510
Hi Guys,

Specs:

ASUS SABERTOOTH X99 ATX Motherboard - LGA2011-v3
I7 6800K - 3.4Ghz
H100I V2
32GB of Corsair Vengeance LPX DDR4 3200 MHz
EVGA GeForce GTX 1080 FTW 8GB GDDR5X
EVGA SuperNova P2 850 W

So I recently put together my first build all well and dandy. It went well and caused me no issues immediately, I found myself playing games such as Arma 3 on ultra presets and my CPU temp went no higher than 70 degrees at most.

Recently I decided to swap the Phanteks stock 140mm fans for some Corsair SP120's and AF120's. It is worth mentioning that I decided to move my water cooling system from the top mount on the case to the front of the case due to the pipes not fully fitting into the system and resting close to the back-plate of my 1080.

I kept the stock fans that came with the H100i V2. After installing all of my fans I booted my system to be greeted with a CPU temp of around 90 degrees. I instantly turned my PC and checked that I had all of my cables plugged in and that the pump was plugged in correctly. I then booted into bios and watched the CPU temp rise once again however not as fast.

I decided to reseat the cpu making sure to install carefully. Once I had reseated I turned on my pc and the temperatures have gone down. they sit at around 40 Degrees Idle (This is still warmer than before I changed the position of the radiator as it use to sit at 27 - 31) and when under load when playing games it rises to 89+. At that point I shut off the system.

Any ideas would be appreciated. Thanks!
:)
 
Solution
With the radiator now mounted in the front I assume the cooling hoses are at the top edge of the radiator where they connect to it? Is the top edge of the radiator where the cooling hoses are attached roughly level or below the cpu cooling block? If so air may be getting trapped in the pump. It wouldn't take a whole lot, just a few bubbles. Any air bubbles in the system will eventually work their way to the top whether that's the pump or the radiator. With the radiator mounted on the top of the case the air bubbles would tend to rest in the radiator. In the pump they can cause an airlock where the pump tries to spin but instead of pushing water finds air.

I'm not entirely certain this is your issue but it could be and since the...
With the radiator now mounted in the front I assume the cooling hoses are at the top edge of the radiator where they connect to it? Is the top edge of the radiator where the cooling hoses are attached roughly level or below the cpu cooling block? If so air may be getting trapped in the pump. It wouldn't take a whole lot, just a few bubbles. Any air bubbles in the system will eventually work their way to the top whether that's the pump or the radiator. With the radiator mounted on the top of the case the air bubbles would tend to rest in the radiator. In the pump they can cause an airlock where the pump tries to spin but instead of pushing water finds air.

I'm not entirely certain this is your issue but it could be and since the problems began after moving the radiator. If it makes it easier use a ruler or piece of paper, something with a straight edge. Use it to create a horizontal line at the level of your cpu water block and look at it straight on from the side of the case with the cover off. It should make it easier to see if the radiator is above or below the block.

Here's an example of what I mean.
44ff401c266c4c4c860d9892d1311a71.png

The red line shows a level mark from the water block to the top of a front mounted radiator. The yellow highlights the block and the radiator to make them more visible. In this particular photo the builder set it up a bit different than you did, their cpu radiator is in the top of the case and the gpu radiator is in the front of the case. In both cases the green arrows show how the water blocks are lower in level than their respective radiators. If the front radiator were instead connected to the cpu it could potentially be an issue since it places the block level or higher than the radiator. Without a reservoir as found in custom builds, there's nowhere else for any free air inside the system to go except to the upper most component which would likely be the block in your case.
 
Solution

Wadeyy

Commendable
Jan 5, 2017
2
0
1,510


Thank you so much ! This seems to have worked. I have re fitted the radiator to the top off the case. After a little bit of testing I am running at around 55 - 58 when playing games.

Again I really appreciate your time spent on this answer!