CPU Overheating - 70 degrees Celsius Idle

[Ben_keeling]

Hello,
I build my brother a PC about 2 weeks ago and during that time, about once every 3 days, the pc would just randomly go to a black screen during games and periods of load. To find out what was wrong with it I ran some benchmarks and noticed that the CPU was going above 85 degrees Celsius during this tests and causing the tests to terminate. I then went into BIOS and noticed that the CPU was about 72 degrees Celsius while just in bios not doing anything(idle). I'm using a stock cooler and as far as I can tell all the fans are working correctly. The CPU thermal paste is also the stock paste that comes pre-applied.
I've got a i7 4790K with the stock fan and paste in my build and when running the same tests the CPU never goes above 60 degrees and is 30-40 idle.
The CPU is not overclocked nor is the GPU. Any help would be appreciated. Thanks

CPU: i5 4690K
GPU: GTX 970
Motherboard: Gigabyte GA-H81M-HD3 Socket 1150
PSU: EVGA 600 W 80+ PC Power Supply Unit
RAM: HyperX 8 GB 1600 MHz CL9 DDR3 HyperX Beast
Case: CiT Vantage White Gaming Case Black Interior 4 Fans HD Audio Card Reader

http://imgur.com/3ayaYr1
http://imgur.com/UbPMZMu
http://imgur.com/bwcwjJA

 

[G-star93]

Maybe something is wrong with chip itself, or cpu cooler.

 

[GhislainG]

Check the cooler; a pin probably isn't fully locked in place.

 

[thx1138v2]

You're not comparing apples to apples so that comparison is invalid.

It might be an air flow problem. To test for this pull the side cover off and see if the temperature goes down. If so, it's an air flow problem.

Also check ambient air temperatures. The higher the ambient air temperature the less heat the air will absorb.

Everything in the box generates heat so it's not just the CPU, paste, heat sink, and fan you need to examine. You need to look at the entire build, fan speeds, air flow, and ambient air temperature.

It definitely doesn't hurt to get better CPU cooling. I don't overclock or usually run any heavy loads but I get 3rd party cooling rather than using the stock cooler as a kind of insurance against heat problems.

85C isn't outside of the max heat spec but it is high. Take a look at the individual core temperatures. You might have one or more cores running hot and they could be over max temperature which will sooner or later destroy the CPU. At 85C you probably don't have heat damage in the CPU - yet.

 

[GhislainG]

You're not comparing apples to apples so that comparison is invalid.

It might be an air flow problem. To test for this pull the side cover off and see if the temperature goes down. If so, it's an air flow problem.

Also check ambient air temperatures. The higher the ambient air temperature the less heat the air will absorb.

Everything in the box generates heat so it's not just the CPU, paste, heat sink, and fan you need to examine. You need to look at the entire build, fan speeds, air flow, and ambient air temperature.

It definitely doesn't hurt to get better CPU cooling. I don't overclock or usually run any heavy loads but I get 3rd party cooling rather than using the stock cooler as a kind of insurance against heat problems.

85C isn't outside of the max heat spec but it is high. Take a look at the individual core temperatures. You might have one or more cores running hot and they could be over max temperature which will sooner or later destroy the CPU. At 85C you probably don't have heat damage in the CPU - yet.

72°C in the BIOS is not normal. The CPU is designed to throttle or shut down before being damaged.

 

[johnnyb105]

As said above you need to re check the heat sink make sure the pins are in place and secure theres also the case with air flow are you guys using the same exact cases if not do as what is said remove the side panel and see what the temps are a cheap after market cooler is almost always going to be much better at cooling your cpu then the factory one.

 

[Ben_keeling]

I've taken the CPU fan off and re applied it with no difference. I'll go take the side off and check the temperature then.

 

[Ben_keeling]

I've taken the CPU fan off and re applied it with no difference. I'll go take the side off and check the temperature then.

 

[Ben_keeling]

No difference with side panel off with temperature slowly rising to 70 degrees celcius in bios with CPU Fan speed nearing 2000 rpm

 

[Ben_keeling]

And no we are using different cases with his being slighly smaller so I am expecting slightly higher temperatures but nothing this high.

 

[mp5mafia]

Re-fit cpu heatsink with new thermal paste.

 

[Ben_keeling]

Do you have a specific thermal paste you would recommend?

 

[mp5mafia]

Mx-4 works fine for me

 

[Ben_keeling]

I've attached some images so people can see the voltages in BIOS and stuff

 

[mp5mafia]

It all looks normal apart from the idle temps lol
Get that heatsink re-sitted man 😀

 

[Ben_keeling]

It all looks normal apart from the idle temps lol
Get that heatsink re-sitted man 😀

Ok, I'll order some thermal paste and re apply it and see how it goes. The Fan is seated properly atm however so i don't know how much of a difference a different thermal paste will make.
Thanks for the help though

 

[GhislainG]

If you didn't replace the thermal paste, then there probably are air bubbles between the CPU and cooler. You always have to replace the thermal paste.

 

[mp5mafia]

By saying "fan" you mean the whole cooler or just actual fan?
Even if you re-fitted the wholecooler again stock pre-applied thermocompound is very dense and dried out out of the box so probably not doing great job by now.
The only other thing I can think of is if you mess with C states or something so always worth to clear cmos to make sure you get those default settings in your bios.

 

[Ben_keeling]

Yea I removed the whole cooler. CPU was still overheating before this though. Waiting for thermal paste to arrive in the post on Tuesday. Will post what happens.

 

[Ben_keeling]

Replaced thermal paste and although the temperature was 3-5 degrees lower in idle the CPU still overheated everytime I ran the benchmark. Would you say that at this point it is a faulty CPU?

 

[GhislainG]

What happens when you run the latest version of Prime95 Small FFTs (don't run it for more than a few minutes)? It will throttle if it reaches 100°C, but does it run properly? Your choice of motherboard (3+1 phase VRM) isn't optimal.

 

[Ben_keeling]

It overheats within 8 seconds so I think I'm just going to send it back to Amazon. They're delivering a new one tomorrow and picking up this one.

 

[GhislainG]

This thread is a bit confusing because you selected a best answer which normally indicates the issue is resolved, but you're now swapping the CPU because you still have issues.

 

[Ben_keeling]

I swapped the CPU which resolved the issue but I gave thx1138v2 the best answer as I believe he contributed the besr answer even though no one was correct.