Cpu reaching over 100C while rendering

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Uberbor3d

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Aug 25, 2013
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Hey guys I have a Pc I built about a year ago. It has an i7 3770k oc. Most of the time it idles around 40c.
Today I decided I would record some video and render it to .mp4 to upload it to youtube. But when I started to render my temps shot up to over 100c and cpu usage was at 100% I canceled the render immediately.
I want to know if its safe to go to that temperature.
If its not what can I do to fix the issue.
 
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Karadjgne
The i7-3770k is not a mid-end cpu, its the highest-end lga 1155 cpu and with ht enabled it's also the hottest running. When doing something that requires 100% cpu usage on 4 cires+ht like rendering, an aftermarket cpu cooler is most definitely advised. The Corsair h100i is capable of @6°C above ambient temps on average so in a normal @72°F room, temps at idle should be high 20's to low 30's. If installation is correct, then check the fans for correct speeds, and check the fan curves for a good speed setting. Even with 1 fan totally dead, you shouldn't be seeing temps over 80°C during rendering and if both fans are working correctly you should be seeing temps in the mid to high 50's at worst.

Airflow is important regardless of actual...
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Uberbor3d

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Aug 25, 2013
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Not sure was not paying attention to the wattage while it was under full load.
Im using a h100i cooler.
 
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Uberbor3d

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Aug 25, 2013
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Im glad I turned of the render.
Im using a corsair H100i. The case is a thermaltake 10gt. I have never tried running my pc without the side panel so I wouldnt be able to tell you.
 
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kanewolf

kanewolf

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May 29, 2013
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40C idle on an H100i is way too much. You need to re-read the installation instructions and re-install. It sounds like there is something wrong with your H100i installation.

It is also possible that the pump in your H100i has failed. Are you using the Corsair software to monitor the pump?
 
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Uberbor3d

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Aug 25, 2013
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Corsair link says the pump is running at 2246 rpm.
 
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kanewolf

kanewolf

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I believe I will go back to, my statement of carefully re-read the installation directions for the H100i and re-install the pump on the CPU. Something isn't right.
 
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AaronB75

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Feb 27, 2015
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Its either the Heatsink incorrectly installed, or incorrectly reported temperatures. For the latter you can try with CoreTemp, which is specialized on only doing temperature readings. Also, you should pay attention to performance or unexpected shutdowns. If it ain't throttling, nor shutdowns or stability issues, I wouldn't believe it is really overheating. And if the Heatsink was improperly installed, you need to unmount it, clear the Processor and the Heatsink base, reapply paste and install it again. A mid end Processor shouldn't need aftermarket cooling.

Airflow is important as components starts to clutter, but for a simple computer in an ATX cases with no discrete Video Card, you don't even need Case Fans. After several hot 30°C+ summers with several machines with no Case Fans I can say than low end and mid end parts doesn't really needs them.
 
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Karadjgne

Karadjgne

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Dec 26, 2012
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The i7-3770k is not a mid-end cpu, its the highest-end lga 1155 cpu and with ht enabled it's also the hottest running. When doing something that requires 100% cpu usage on 4 cires+ht like rendering, an aftermarket cpu cooler is most definitely advised. The Corsair h100i is capable of @6°C above ambient temps on average so in a normal @72°F room, temps at idle should be high 20's to low 30's. If installation is correct, then check the fans for correct speeds, and check the fan curves for a good speed setting. Even with 1 fan totally dead, you shouldn't be seeing temps over 80°C during rendering and if both fans are working correctly you should be seeing temps in the mid to high 50's at worst.

Airflow is important regardless of actual components used. As heat accumulates, it is recycled through the cooling fins of cpus and gpus, lowering their ability to dissipate heat effectively, which raises their temps, which gets recycled and on and on till a point of saturation is reached when the cpu/gpu isn't putting out more heat than is already existing. Under normal workloads this can be as high as 80°C or so, and during heavy loads can be over 100°C. Considering op has a dual fan radiator, it'll act as either intake fans or exhaust, creating airflow, albeit not that good, but temps should be manageable.
 
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