High CPU temps w/ Water Cooling

Wavy7s

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Feb 22, 2017
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Just upgraded my build to watercooling, and the temps I am getting do not seem normal at all.

Before I jump into detail...

PCPartPicker part list: https://pcpartpicker.com/list/xWR3jc

CPU: Intel Core i7-7700K 4.2GHz Quad-Core Processor

CPU Cooler: Cooler Master MasterLiquid Pro 280 64.2 CFM Liquid CPU Cooler

Motherboard: MSI Z270 SLI PLUS ATX LGA1151 Motherboard

Memory: G.Skill Ripjaws V Series 16GB (2 x 8GB) DDR4-2400 Memory

Storage: ADATA Premier SP550 480GB 2.5" Solid State Drive

Video Card: EVGA GeForce GTX 1070 8GB FTW Gaming ACX 3.0 Video Card

Case: Fractal Design Define R5 w/Window (Black) ATX Mid Tower Case

Power Supply: EVGA 650W 80+ Gold Certified Semi-Modular ATX Power Supply

When I first booted up my PC and went to BIOS, the initial temp there were 44C to 45C. Move on to idle on Windows, I get 39C to 43C. When I start putting a load onto the CPU, tempatures jump up into the 70's really quick and start to hit mid to high 80's not long after. Even hit 90C at one point and probably would have gotten up into the 90's had I not quit some processes. The load did not even pass 17% according to RealTemp. Also, the watercooler was extremely loud at this 17% load, to the point where it sounded not normal.

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I stream on Twitch, so I have a game running (H1Z1), Spotify, OBS Studio, plus quite a few other programs and things running. I used to be using a $20 Heatsink + Fan before this and did not see temps over 80C, so something has got to be wrong. I don't really think the Cooler is seated wrong. I applied the right amount of thermal paste, and it's mounted as it should be.

P.S: I have two things on my MOBO called CPU_FAN1 and PUMP_FAN1, I'm not sure which to plug the water cooler base into, and the radiator fan splitter into.

Appreciate any help that can be provided, I don't really know what other information to add so ask as many questions as you need.
 
Solution
Thought I might share my experience of improving cooling on the i7-7700k.
I use a big air cooler which I previously used on my 2500k for years.
I delidded my CPU using my bench vice. Spent an hour cleaning all the gasket material and nasty cheap ass TIM off of the die.
I then applied the tiniest amount of coollabs liquid ultra onto the die. Applied a tiny amount of non hardening liquid gasket to the heat spreader and then put it back on the CPU board.
I then very carefully put the CPU back into the motherboard socket and secured it down. Making sure the heat spreader didn't get moved by the securing bracket. It makes a great clamp for allowing the liquid gasket to go off.
Whilst that was happening I cleaned up the top of the heat...

eno1986

Distinguished
Feb 27, 2015
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18,640
Sounds like it might be your cooler that model has horrible reviews I have the same CPU with a nzxt kraken x61 my idle temps are around low to mid 30C and when gaming they are around 45 to high 50'sC I don't steam games, but when I stress test my CPU I get high 70C (my CPU is not overclocked.)
 

Wavy7s

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Feb 22, 2017
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510


Mid 30's on Idle, mid 50's during gaming while running all my other programs needed for streaming.
 

shayan760

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May 2, 2017
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What did you do?????
I have the same problem.


 

shayan760

Prominent
May 2, 2017
2
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510


What did you do?????
I have the same problem.
 

uglyduckling81

Distinguished
Feb 24, 2011
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Thought I might share my experience of improving cooling on the i7-7700k.
I use a big air cooler which I previously used on my 2500k for years.
I delidded my CPU using my bench vice. Spent an hour cleaning all the gasket material and nasty cheap ass TIM off of the die.
I then applied the tiniest amount of coollabs liquid ultra onto the die. Applied a tiny amount of non hardening liquid gasket to the heat spreader and then put it back on the CPU board.
I then very carefully put the CPU back into the motherboard socket and secured it down. Making sure the heat spreader didn't get moved by the securing bracket. It makes a great clamp for allowing the liquid gasket to go off.
Whilst that was happening I cleaned up the top of the heat spreader, reapplied Arctic Silver 5 and put the heat sink back on.
I didn't take screen shots or make the testing scientifically accurate, I just observer the results.
Immediately before I started the process I ran Intel Burn Test. Stock clock speeds for before and after testing.
Before - 75C
After - 62C
Also note that the entire process took me a couple of hours and in that time the ambient temperature rose by some amount. I started at about 8:30am when it was still quite cool and by 11:00am or so when I finished it was reasonably warm. I didn't measure it but there was some difference.
I went to a weather site and it said it was 18C when I started and was 22C when I finished, 4C difference potentially.

That's at least a 13C-17C improvement from doing nothing but improving the quality of the TIM. Not bad for a mornings work.
 
Solution