Rendering makes my CPU get extremely hot

[Shadow Aley]

Specs: i7 4790k; H100i GTX cooler

Hey so I've been having this issue for as long as I can remember. So when I render videos my CPU temps can reach upwards of 90c. This is very bad so I've decided to hold off rendering them for the time being.

The weird part is that my temperatures for games such as The Witcher 3, Overwatch, Arma 3... etc will range from 45 min to about 60 max. Why is it that rendering videos makes my temp skyrocket? I've reapplied thermal paste, made sure the fans were blowing.

 

[richardvday]

Specs: i7 4790k; H100i GTX cooler

Hey so I've been having this issue for as long as I can remember. So when I render videos my CPU temps can reach upwards of 90c. This is very bad so I've decided to hold off rendering them for the time being.

The weird part is that my temperatures for games such as The Witcher 3, Overwatch, Arma 3... etc will range from 45 min to about 60 max. Why is it that rendering videos makes my temp skyrocket? I've reapplied thermal paste, made sure the fans were blowing.

When your playing games you are GPU limited not CPU limited.
When you are trans-coding your CPU is now running at 100% and your cooling setup is inadequate.

Simple test, take side cover off and blow a box fan into your computer and it should fix the problem.
Long term re-evaluate your cooling setup for your computer. See one of the many threads on this subject for information on that.
Good luck

 

[James Mason]

Your cooler may not be... setup to work at max speeds when needed.
Check your corsair link software.
Your cooler fans may not be working as hard as they could, assuming they're connected to an PWM header, or you may have connected them to a low-noise/low-power "adapter" that limits their max speed.

Also your case may be designed poorly for good airflow, like if you have a flat front panel case, or a dust filter on the front of your case/CPU cooler will heavily limit the airflow the CPU cooler gets REGARDLESS of the fans you have on it.

 

[The Original Ralph]

i'm running a 4790 (non-k) on another computer and render quite a bit when my main rig is tied up.

Depending on the software you're running, CPU usage can go high, like 97-100%, and the 4790K is known to run hot. I run Handbrake a lot, and it's a core hog, all 4 cores are showing 97-100%, and my temps never exceed 66 - 68C. My CPU is OC'd to 4.0, and i'm running a noctura cooler NH-U12S. For your 4790K you might want to run a good air cooler, the noctura is a good quality cooler, but some feel they're priced a little rich - but a Noctura D14 or D15 would be a good choice if your case has the head room. You also might want to limit your OCing if you've taken it to the limit.

Another tip, good airflow in the case is also critical - you want positive air pressure inside the computer case, ie more airflow in, than exhausting out. If you've got more airflow out than in, you've got negative airflow - think when you were a kid, and riding in your folks' car, you stuck your head out the window, not facing into the airstream, but perpendicular to the car, and tried to inhale - the air going by your face created negative air pressure. With negative air pressure in your case, your CPU fan is trying to suck air that isn't there - and the fact that you've got a water cooler, you've probably got more fans exhausting air than pushing it into the case, which means you've probably got serious negative air pressure.

Consider a good air cooler, and junk that water cooler

if you want to monitor your cpu usage, you can either open task manager or download RealTempGT - it minimizes to a small monitor panel i keep in the bottom right corner of my desktop - it's the green "widget" in the pix at this link https://imgur.com/a/x83G2

if you're worried that you might have damaged your CPU - forget about it - see what i posted at http://www.tomshardware.co.uk/answers/id-3550147/cpu-overheating-age.html#20304533
hope that helps