Cpu over heating?

[Moomalade]

Hi,
I recently built a pc with an intel i9 9900k, cooled with a Corsair H80i.
I use it mainly for 3D animation and video editing. Normally the temperature of the cores when both video editing software (DaVinci Resolve) and 3D software (Autodesk Maya) are open and in use is fairly ambient, in the 30-40 degree range.
This has been pretty constant for the month I've had the machine in use.

However last night I had to reencode a high bitrate 2 hour video with handbrake software. I noticed the fans going into overdrive so checked the temps and on all eight corse they were in the 80-90 degree range.
I immediately ceased the task and everything returned to normal pretty quickly. All the fans are operating fine as far as I can see.
I know video encoding is a very intensive cpu process, is it possible that it was just a very demanding job, or is it likely I've bodged the h80i cooler install?
Any advice would be much appreciated.
I'm a bit afraid now to do some hardcore stress test in case I fry something.

 

[Moomalade]

Hello, you are unlikely to fry something, worst case scenario the system shuts its self off, and more likely it would just slow down to keep the temps under control.
the 9900k is "fine" upto 90 and yeah that is a demanding task which could very well be pushing the cooler to its limits, but it might be worth double checking that you have good contact between the cooler and the CPU. Also extra case airflow can make a solid difference.

Thanks, that's helpful advice.
I will look into the possibilty of fitting another fan to improve air flow. Currently there's the two H80i fans as exhaust (top front), one intake fan at the bottom front, and another exhaust at the back. Should I look at another intake fan or keep pushing air out?
As for checking the connection between the cooler and the cpu, will this involve taking it off completely and re-pasting and sealing again, or could I just give it a bit of a tighten on all four screws first?

 

[Moomalade]

The 9900K is a fairly toasty chip. It really is pushing the limit of what Intel can achieve wit the current structure. A H80 is likely on the "slim" side of a cooler for it as well. I personally run mine with a Noctua NH-D15 but wouldn't use anything less than a 240mm if I was using an AIO.

Thanks for the info. That puts me in a bind, I don't think I've got space for anything else. I may need to reconfigure into a larger case. Currently using a Corsair Carbide 275r. It was all a bit of a squeeze to be honest, and the hardest aspect of the build (my first ever).

 

[Moomalade]

Thanks for all the replies, they were really informative. I'm going to look into a bigger more effective cooler, that's great it'll fit. I guess the stacked nature of the fans on the h80i rad made me think I wouldn't have enough room. I'll also look into reversing the fan direction so they are intake instead of exhaust.

But it's put my mind at ease the temp measurements are not outlandish under the heavy load of handbrake encoding.