I found out my GPU overheating/case problem
This is more of a thinking out loud post xD
Well, I switched cases from a define R7 to a phanteks p600s for airflow reasons, and idle temps did go down quite a bit, but gaming and stress temps on the GPU haven't changed much, a few C, even after adding aftermarket fans, and now I see why.
First, the R7 isnt an airflow case, that was the first problem, that is now solved.
Two, and this is that part that makes all the difference, is that I'm using a noctua NF D15 CPU cooler. What does a CPU cooler have to do with GPU temps? Everything, in my scenario. The fan hub controls only fan temps on the CPU obviously, and my CPU runs really cool, rarely getting over 45-55c EVER unless I REALLY stress test it, and I have to do that on purpose. The fans are speed set in the BIOS, only ramping up over 50% on rare occasions. 2k RPM fans are idling around 900RPM but never get over 1100 due to CPU cooling efficiency.
Three, I use a 2k monitor. More stress on the GPU while in game while the CPU is still sitting at 35-40c which means the case fans don't ramp up really at all, allowing the GPU to heat up and hit 70-75c+ as the case fans aren't blowing hard enough to provide any backup or relief to the GPU.
I cant change the fan speeds in the BIOS much more than they already are, if I use a tighter fan control, the fans will be ramping up and down constantly even after the slightest temp change to the CPU, and that is not good for the fans.
All the back peripheral slots have been removed as well to maximize airflow as well, but I really didnt see a difference in temps in this scenario.
Aside from a dedicated fan controller to control the bottom fans blowing directly at the GPU, then I dont see a way to alleviate this problem.
Any input on this would be appreciated, maybe there is a different method I can use that I'm not aware of to help these GPU temps in game.