CPU fans too loud/ CPU too warm with liquid cooling

GoldenBoy99

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Aug 14, 2014
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Hey everyone! You guys were a great help in the past so I figured I'd try this place again. A little background first: I built my computer on May 8th but waited for a GTX 1080 FTW, so I used integrated graphics until a week ago when I received my GPU. This is my first PC I've built and I've been able to solve all previous problems myself but I'm not sure about this one.

My rig runs games excellent at max settings and 1440p but I haven't played much because of how loud my PC has been getting. When I first start using it after a break it's near silent but as time goes on it starts to get louder and warmer (I've been using Speccy to monitor out of games), often getting to the point where it's audible while watching shows and videos. My old PC made some noise too so I'm pretty used to it, but I imagine a high-end PC like mine could be quieter. As for temps, with Speccy my CPU started at around 25c after a break and then stayed in 30s and jumped into the 40s when clicking on things. Often when simply clicking on things like opening an application or clicking on a link the temp would spike and the fans would whir up.

What made me start worrying about this was when I tried a couple games on my new GPU for the first time like BF4 and Call of Juarez Gunslinger it got very loud. It starts very quiet on games but after a few minutes on games it gets quite loud and when I put my hand over my CPU radiator it's warm/hot. It was worst once in each game: the CPU fans (I'm pretty sure it's them as it's the same noise from before I got the GPU, I can lower or raise the voltage on my case fans and the noise is the same, and they get much louder when I go in Corsair Link and change them from Quiet to Balanced or Performance) sounded like they were maxed out (very loud) on quiet and when I stuck my hand over the radiator it was hot air. It made me scared to keep playing the games so I've only tried short sessions since then to test things and measure the temp. I know some people say to wear headphones but I can't imagine the people who spend thousands of dollars on these PCs put up with such a loud noise.

I installed a few monitoring applications like MSI afterburner and noticed the temps increasing as time went on (even though nothing more intensive was happening, sometimes I was even standing still) and would stay in the upper 60s c and 70s c, making jumps near 80 sometimes. I ordered some MX4 thermal paste and it got here yesterday, thinking the stock thermal paste could've dried and caused bad head conductivity. When I was cleaning I noticed it spread nicely though and looked alright. I put the new stuff on and although it started silent again the fans are still very loud and the CPU appears to reach the same temps when playing games. This gave me some anxiety yesterday as 2 months of my summer have more or less consisted of me waiting for parts, and now I didn't know what was wrong or how to fix it. I'm fine now but still greatly want to know how to fix this as soon as possible so I can get back to gaming. My liquid cooler is the Corsair H100i v2 and after reading some Amazon reviews some people have experienced similar problems so I'm tempted to RMA it if I can but I want to be sure of the problem first. If it's relevant, my case only came with 1 intake and 1 exhaust fans, and I have 2 more exhaust from the cooler so I have a total of 3 exhaust and 1 intake. I thought maybe this would lead to higher temps, but I read negative airflow will get your PC just as cool, plus the other parts in my PC have good temps and are quiet. For liquid cooling I expected my CPU to be cooler and quieter, not having to get so loud or hot every time I do something.

I have a general knowledge of computers and how they work since I built it, but I'm not the best so I welcome many suggestions. Just ask and I'll inform you of what I can. Thanks for reading to here ( I know it's a lot but I wanted to give as much information as I could) and thanks a lot for any help in advance.

Specs:

Intel Core i7-6700K 4.0GHz Quad-Core Processor
Corsair H100i v2 70.7 CFM Liquid CPU Cooler
Asus Z170-A ATX LGA1151 Motherboard
G.Skill Ripjaws V Series 16GB (2 x 8GB) DDR4-3200 Memory
Samsung 850 EVO-Series 500GB 2.5" Solid State Drive
EVGA GeForce GTX 1080 8GB FTW
Fractal Design Define R4 w/Window (Black Pearl) ATX Mid Tower Case
EVGA 750W 80+ Gold Certified Fully-Modular ATX Power Supply
Lite-On iHAS124-14 DVD/CD Writer
 
Solution
Cooling is all about air flow, whether it is a liquid or air cooled system. You have to get the air into the case and through the radiator out of the case for it to carry the heat away. The easiest way to check your air flow is pull the side cover off and see if the temperatures go down. If they go down you have an air flow problem and the more they go down with the side cover off the more severe the air flow problem.

Another thing to consider is ambient temperatures. Anything you can do to reduce ambient temperatures will make your cooling system perform better. I suspect your ambient temperatures are somewhat higher now than when you used it before adding the graphics card so that will be a contributing factor also.
Cooling is all about air flow, whether it is a liquid or air cooled system. You have to get the air into the case and through the radiator out of the case for it to carry the heat away. The easiest way to check your air flow is pull the side cover off and see if the temperatures go down. If they go down you have an air flow problem and the more they go down with the side cover off the more severe the air flow problem.

Another thing to consider is ambient temperatures. Anything you can do to reduce ambient temperatures will make your cooling system perform better. I suspect your ambient temperatures are somewhat higher now than when you used it before adding the graphics card so that will be a contributing factor also.
 
Solution

GoldenBoy99

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Aug 14, 2014
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First of all, thanks a lot for the reply! Second, you may have inadvertently just solved everything. I knew things were louder now than before the GPU but I didn't think it was its fault. It may be related, though. I was a little scared to take off the side panel before while it was running but after you replied I did. The first thing I noticed was my only intake fan wasn't running, there was a cord in its way. I somehow completely missed it while operating on my PC before and it was preventing it from spinning, which would obviously change temps a lot. It'd make sense if I knocked that in there when I was putting my GPU in. With the way my case is set up I couldn't tell if it was spinning or not, and idk if I looked directly at it in the past week. I feel embarrassed now but it'll be worth it if it's fixed. Thanks again for replying, it's crazy how the simplest first solution can fix things.
 

GoldenBoy99

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Aug 14, 2014
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4,530
Thanks so much, that made it a lot cooler and the fans don't spin as fast now. If I wanted it to be quieter I could replace the radiator fans since people have said they're noisy no matter what. My tower is literally inches from my monitor so it's pretty easy to detect some noise often. I'll counter that when gaming by wearing my good headphones. Also, if I wanted to better the airflow I could add a second intake fan.