Well I had a thread regarding my GPU getting heated up months ago. I was not able to solve the problem. It would go upto 110C.
I tried everything from cleaning my case and also applying thermal paste in the GPU but nothing helped. People suggested I should try installing case fans etc. but I thought that would not solve the issue as my GPU was getting heated up to a very extreme extent. Moreover, if it was airflow issue, then it should have affected other components too in my CPU which did not happen. My core temperatures etc. were fine.
So, I removed the GPU.