I just received my new Cougar Panzer-G, I never had a tempered glass case before, the case comes with 3 fans in the front but when I close all the pannels the airflow is so bad that the left pannel gets to hot and my GPU temp goes up by about 10deg. Is this normal? Do I need to add more fans for airflow? Reading a review from Toms Hardware they give a good opinion on the case's airflow, so I am kind of lost. Any advice?