If you're seeing 82C load temps that's "high" but not unsafe.  If you want to see how "good" the airflow is in your case, you can always test with the side of your case off, and see if your temperatures are better, worse, or the same.
 
I would highly recommend if you have the space and a spare fan, to setup a 120-140mm fan under the GPU blowing OUT of the expansion slots of your case, this will push the hot air the GPU will otherwise recycle, out of the back of the case - it helped quite a bit with my load temps back when I had an air-cooled 3080 FTW3 Ultra.