Safe GPU Temp

Solution
running 85 is definitely worse when you consider half of the gpu is unused. Once you try to max a game and then use the rtx and tensor cores as well it will be way too hot. That's normally a very cool running gpu, I'd definitely take off the panel until you can do something about air intake into your case.
I am running 81-85c with the case closed as it comes. However was a little nervous about the temp so I took off the front glass panel and front panel where radiator fans are for the CPU. In your opinion which is worse... play longterm at 85c or take off front and side panel and play 72-75c? Thanks in advance for any help its much appreciated.
 
running 85 is definitely worse when you consider half of the gpu is unused. Once you try to max a game and then use the rtx and tensor cores as well it will be way too hot. That's normally a very cool running gpu, I'd definitely take off the panel until you can do something about air intake into your case.
 
Solution
Have you tried manually adjusting the fan arc on the GPU ? Running the fans at 100% earlier in the heat arc may prevent them from getting as hot. If not prevent them it will certainly slow down the rate at which they heat up to 80 degrees. You can set them to run at 100% all the time if you can stand the noise.
 


 
If removing the case panel is making a 10-13 degree difference in your GPU temps it sounds like you need to make some adjustments to get better airflow. In most cases it makes sense to have air intake in the bottom front and exhaust in the top rear.

For example, in my case I have one intake fan on the bottom of my case and one intake fan in the lower front panel slot. This is pushing cooler, outside air directly towards my GPU. The case has a built in exhaust fan on the top rear. My CPU cooler blows directly towards this rear exhaust. I also added exhaust fans to both of the slots on the top of my case, just above the CPU.

It's important to make sure your airflow is moving in one general direction instead of having a bunch of fans pushing air into each other. Also, remember that heat rises. That's why I always go with intake in the front and bottom and exhaust in the top and rear.

My Gigabyte G1 1070 is typically between 65 and 68 C under load. The 1070 uses a lot less power than your 2080 Ti so it's obviously not a fair comparison for temperatures. I just think there is a lot of room for improvement in your temperatures with better case airflow if removing the panel makes that much difference.