High GPU temperatures due to case airflow

[fabiod]

I just built my new desktop PC, but at the moment I am experiencing some annoying airflow issues with my Aerocool QS-240 case.
With a room temperature of 22°Celsius, CPU temperatures are good, idling from 24-25° Celsius to reach 50° under load.

Issues come with my GPU which starts from a fine 31°C idle to 85-86°C under load using Unigine Superposition with High Details at 1080p.
I tried to get rid of the problem by placing an intake fan on the front-bottom of my case, pointing exactly in direction of my GPU, and an exhaust fan on the back-top but, surprisingly, there are zero changes in my temps.
I double checked my fans directions and they are just placed as intended.
I also tried to put my GPU under load with my case panel open and only in this way I can get dreamy 67-68°C GPU Temperatures.
Unfortunately, this is not a big or a standard case and by design, a side fan cannot be placed.

With all of this being said, I really can't figure out what I'm doing wrong or missing, any help will be highly appreciated.

Here is my config:
CPU: Ryzen 7 1600 with Stock Cooler
MotherBoard: AsRock AB350M Pro4
GPU: XFX GTR RX580 Black Edition @ 1405Mhz Core Clock
Case Fans: Corsair 120AF
Case: Aerocool QS-240
RAM: Corsair Vengeance 3000Mhz, 2x4Gb
PSU: EVGA 100-W1-0600-K2 (600W intake from bottom, exhaust to back)

 

[mdark690]

Have you tried this https://www.youtube.com/watch?v=SRaxrOsRtzA

My CPU temp went up to 75 while gaming and done this and went to 50!

 

[Zerk2012]

I see no temperature problem the video card can run 90C and your putting it at 100% load and it's under that (not realistic to run a card 100%)
50C for the CPU is no problem.

 

[fabiod]

I see no temperature problem the video card can run 90C and your putting it at 100% load and it's under that (not realistic to run a card 100%)
50C for the CPU is no problem.

Thanks for your reply. Yes, a GPU can run with no problem at 90C, but what about throttling? I have performance cuts due to temperature. Moreover, having the case open I got such a big difference in temps, and fans are not influencing in any way the situation. This leads me to think there’s an airflow issue.

 

[Zerk2012]

I see no temperature problem the video card can run 90C and your putting it at 100% load and it's under that (not realistic to run a card 100%)
50C for the CPU is no problem.

Thanks for your reply. Yes, a GPU can run with no problem at 90C, but what about throttling? I have performance cuts due to temperature. Moreover, having the case open I got such a big difference in temps, and fans are not influencing in any way the situation. This leads me to think there’s an airflow issue.

100% load running benchmarks is not a normal load during normal use like gaming.
Use MSI afterburner and set a custom fan curve. 50C=20% 70C=70% 80C=100% and check the box to make it active on PC boot.

 

[fabiod]

I finally figured out what the problem was!!
My case provides 2 options to install front fans: inside the case and outside, behind the front panel.
Initially, with the purpose to save space inside, I mounted my front fan behind the front panel (outside the case) with no cooling effect, but now I installed the intake fan just INSIDE the case, closer to the GPU.
I fiddled then with the AB fan curve as suggested by Zerk2012 and now with this fan setup I can run Super Position steady at 70C with case closed and a good gain of 16°C!
Thanks for your help.