Do you have a better idea?
Post #24: "I've been testing my pc today without the side panel on (I have a Cooler Master K280 case) and the temps were much better. I've been running games with - 10ºC on average and I haven't experienced the stutter of the whole computer yet."
With the side panel off, SOMETHING in your case that was suffering high temps was then getting adequate enough air that the stuttering was no longer present.
Everything has a thermal tolerance of some level... but only so many can cause the stuttering you're experiencing:
-Cpu: already ruled that one out
-Gpu: also ruled out? Should be good until 83C.
-Mobo VRMs: Possible. Causes power throttling when overheating.
-Ram: the thermal headroom on ram is high, even on kits with 3600mhz XMP enabled. Next!
-M.2: You don't appear to have an M.2 drive. Nonetheless, these devices were designed to run warm, so I doubt this would cause it.
-SSD, 2.5": These weren't designed to run as warm as their slim sibling. This could cause stuttering and eventual system freezing if operating over 50C.
-HDD: Same as above.
-Power supply: This would normally shut off and refuse to power back on until it has cooled off, so I doubt this is it.
3 out of the 8 appear to fit your scenario.
EDIT: Oh, I left one out - Gpu Vram. This one's caused by poor manufacturing design. I don't think this is it either, unless you notice anything out of the ordinary in Msi Afterburner...
From what you've said, maybe the SSD and HDD might be the problem but I don't know. Yesterday, at night, my pc was running with the side panel off and it still stuttered twice while watching youtube videos at 1080p60FPS. I don't know the cpu temperature at the time but I don't think it was hot considering the room was cool and, while doing tasks like these, the cpu only gets to 45º - 50ºC Max (with the side panel off).
I see that my gpu and cpu temps are very similar with the side panel on, due to the fact that the hot air stays inside the case longer than it should. Following this statement, with the side panel off, the cpu and gpu run now at 69ºC - 72ºC Max on Anthem with lowest graphics at 1080p (please take note that the cpu is not being fully used (only 50-60 % of usage) and that the GPU is only being used at 50-70 % depending on the situation)
What do you recommend to do?
I've been thinking of getting a side fan that runs at 1400RPM and another fan for the back of the case. Problem is, my motherboard only has a four pin connection for one chassis fan.
I've also been thinking of getting a new cooler, the "Nox Cooler Hummer H-190 Multisocket" (you can find it here:
https://www.pcbem.pt/loja/cooling-2/nox-cooler-hummer-h-190-multisocket/ ) but I don't know if that will make much difference