CPU Temperatures TOO HIGH

mason6 · Mar 27, 2017

So I recently put myself a PC together that I wanted to use for some mid-level gaming and surfing the net. It was my first time so I followed all the guides I could read and made sure to take a step by step process while putting the whole thing together. To my surprise it turned on, booted, and was working fine after the first attempt.

It wasn't until a day or 2 later when I was wanting to look at and tweak the settings of the graphics card and CPU to see what else I could (safely) squeeze out of it, that I noticed the CPU was WAY too hot. When running IDLE with just the BIOS open to see the temperature I was seeing temps around 75-80 degrees Celsius. The minute I start running any type of higher level function (open a game such as Rust) the temps jump right up to 100 degrees Celsius and hover around there but never exceed that value. I immediately got worried and shut down the computer. I then tried to troubleshoot the fans and power supply to all fans/components to make sure I was getting the proper airflow. It seems like all the fans are running (2 chassis fans, 1 CPU fan, and 1 power supply fan), but outside of that I'm not sure what's going on.

I see a few possible reasons my CPU could be overheating:

1) It's the stock heat sink/CPU fan. I've read that this could be the issue, but since I'm not overclocking and running on stock settings I didn't think it would cause such an issue.

2) Not enough/improper use of thermal paste?? It was my first time building a computer and I read that it was bad to add too much. So I tried to use very little and evenly spread it across the contacting surface with the heat sink. Could removing the CPU fan and attempting to re-install it, possibly fix this issue?

3) Could it be that the fans are not interacting with the motherboard and not responding to the increased temperatures of the CPU? Honestly, while the computer is running I never notice a change in the speed or noise level of the fans. But I assumed it was running quiet since it was only a few days old.

4) Fans are not creating proper airflow. Is it possible that the fans are not creating the proper airflow in the case and causing the CPU to overheat? (Do I mount the power supply fan facing up or down? Do I have to change the orientation of the stock fans that are found in the case?)

By the way, here are the parts that I used in my build:

CPU - Intel Core i5-4690K Devil's Canyon Quad-Core 3.5 GHz LGA 1150
Motherboard - ASRock Fatal1ty Gaming Fatal1ty Z97 Killer LGA 1150
Video card - EVGA GeForce GTX 1060 GAMING, ACX 2.0 (Single Fan)
Memory - G.SKILL Ripjaws X Series 16GB (2 x 8GB) 240-Pin
Power supply - EVGA SuperNOVA 650 G1 120-G1-0650-XR 80+ GOLD 650W
Case - Phanteks Enthoo Pro Series (open window)

Thank you for any help you guys can give me. I'm honestly at the point where I'm terrified to do anything else because I don't want to fry the CPU or damage any other component with those high temps.

KyleADunn · Mar 27, 2017

mason6 :

So I recently put myself a PC together that I wanted to use for some mid-level gaming and surfing the net. It was my first time so I followed all the guides I could read and made sure to take a step by step process while putting the whole thing together. To my surprise it turned on, booted, and was working fine after the first attempt.

It wasn't until a day or 2 later when I was wanting to look at and tweak the settings of the graphics card and CPU to see what else I could (safely) squeeze out of it, that I noticed the CPU was WAY too hot. When running IDLE with just the BIOS open to see the temperature I was seeing temps around 75-80 degrees Celsius. The minute I start running any type of higher level function (open a game such as Rust) the temps jump right up to 100 degrees Celsius and hover around there but never exceed that value. I immediately got worried and shut down the computer. I then tried to troubleshoot the fans and power supply to all fans/components to make sure I was getting the proper airflow. It seems like all the fans are running (2 chassis fans, 1 CPU fan, and 1 power supply fan), but outside of that I'm not sure what's going on.

I see a few possible reasons my CPU could be overheating:

1) It's the stock heat sink/CPU fan. I've read that this could be the issue, but since I'm not overclocking and running on stock settings I didn't think it would cause such an issue.

2) Not enough/improper use of thermal paste?? It was my first time building a computer and I read that it was bad to add too much. So I tried to use very little and evenly spread it across the contacting surface with the heat sink. Could removing the CPU fan and attempting to re-install it, possibly fix this issue?

3) Could it be that the fans are not interacting with the motherboard and not responding to the increased temperatures of the CPU? Honestly, while the computer is running I never notice a change in the speed or noise level of the fans. But I assumed it was running quiet since it was only a few days old.

4) Fans are not creating proper airflow. Is it possible that the fans are not creating the proper airflow in the case and causing the CPU to overheat? (Do I mount the power supply fan facing up or down? Do I have to change the orientation of the stock fans that are found in the case?)

By the way, here are the parts that I used in my build:

CPU - Intel Core i5-4690K Devil's Canyon Quad-Core 3.5 GHz LGA 1150
Motherboard - ASRock Fatal1ty Gaming Fatal1ty Z97 Killer LGA 1150
Video card - EVGA GeForce GTX 1060 GAMING, ACX 2.0 (Single Fan)
Memory - G.SKILL Ripjaws X Series 16GB (2 x 8GB) 240-Pin
Power supply - EVGA SuperNOVA 650 G1 120-G1-0650-XR 80+ GOLD 650W
Case - Phanteks Enthoo Pro Series (open window)

Thank you for any help you guys can give me. I'm honestly at the point where I'm terrified to do anything else because I don't want to fry the CPU or damage any other component with those high temps.

That's very high just sitting in BIOS for even a stock cooler.

How did you spread the coolant? The stock heatsink comes with paste already applied. Did you remove the sticker and then the paste underneath it, and if so, what after market paste did you add? Also, the intel stock coolers are a bit of a pain to put on at first. Did you make sure to tighten/spin/turn the plastic things holding the heatsink down?

mason6 · Mar 27, 2017

I used a standard thermal paste that I bought at Best Buy (I think it was Insignia). It was about $10 bucks and I figured would get the job done. I spread it using the putty knife that came with the tube of paste. As for installing the stock cooler, I did have some issues, but after a few tries I believe I got it installed correctly.

Ecky · Mar 27, 2017

The stock cooler comes with paste preapplied, adding more will have a negative effect. If installed correctly, you can expect to idle in the 30-40c region, depending on ambient temperature.

KyleADunn · Mar 27, 2017

mason6 :

Just to verify, you removed the stock cooler's sticker covering the thermal paste (unless it didn't come with a sticker) that came with it, and removed the thermal paste under that sticker? What did you use to remove this pre-applied paste? If you did not remove the stuff that was already on there before you added that BestBuy stuff, it's too much. At worst, there's so much it could start leaking out the sides and into the sockets.

If one of the 4 punch-downs is not tightened properly, there could very well just not be enough contact with the CPU lid. If you are at all unsure of any of this, I would remove it all and do it again, and this time use the X spread method. It's the best, with manual spreading leaving air bubbles throughout. https://www.pugetsystems.com/labs/articles/Thermal-Paste-Application-Techniques-170/
Remove all the paste on the CPU lid and Heatsink with a lint-free alcohol wipe before reapplying new paste and putting it back on.

mason6 · Mar 27, 2017

Yeah, sorry missed this part. There was no sticker or pre-applied paste on the CPU since it had been installed and un-installed once before (Long story short, got it from a friend who purchased the wrong one). Ill try these solutions when I get home. Thank you!

Faike · Mar 27, 2017

If you're unsure about the spreading method get a good thermal paste and just apply a dot to the CPU. Let the force of the cooler spread it for you. I found that spreading, if you're new to applying thermal paste, can cause people to accidentally create bubbles more often than not and that the simple dot-and-seat cooler method seemed to be more reliable.

mason6 · Mar 28, 2017

KyleADunn :

Removed the old thermal paste and re-applied using the dot method since my stock cooler is round so I didnt want to over apply the paste. Made sure to press the cooler down until I heard all 4 pins from the CPU fan click into the motherboard. Even though it was mounted the first time, I think that there was one of the 4 pins that was not fully installed which was causing reduced heat transfer. The CPU idle temps instantly dropped to around 30 C. After running a thermal stress test at 100% CPU utilization for 20 minutes the CPU core temps were all around 75 C which was great. Thank you for all the help guys. Really appreciate it!

Faike · Apr 27, 2017

mason6 :

KyleADunn :

Removed the old thermal paste and re-applied using the dot method since my stock cooler is round so I didnt want to over apply the paste. Made sure to press the cooler down until I heard all 4 pins from the CPU fan click into the motherboard. Even though it was mounted the first time, I think that there was one of the 4 pins that was not fully installed which was causing reduced heat transfer. The CPU idle temps instantly dropped to around 30 C. After running a thermal stress test at 100% CPU utilization for 20 minutes the CPU core temps were all around 75 C which was great. Thank you for all the help guys. Really appreciate it!

I'm glad the dot method worked for you

It never seems like it'll work but a good thermal paste spreads super nicely with the dot method.

Faike · Apr 27, 2017

mason6 :

KyleADunn :

Removed the old thermal paste and re-applied using the dot method since my stock cooler is round so I didnt want to over apply the paste. Made sure to press the cooler down until I heard all 4 pins from the CPU fan click into the motherboard. Even though it was mounted the first time, I think that there was one of the 4 pins that was not fully installed which was causing reduced heat transfer. The CPU idle temps instantly dropped to around 30 C. After running a thermal stress test at 100% CPU utilization for 20 minutes the CPU core temps were all around 75 C which was great. Thank you for all the help guys. Really appreciate it!

I'm glad the dot method worked for you

It never seems like it'll work but a good thermal paste spreads super nicely with the dot method.

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