I recently threw in my old ATI 4850 into my wife's pc as a crossfire setup that already had a 4870. For the most part, this has worked great. I have have seen a decent improvement on all games played with very little issues. During periods of extended gameplay(3 hours+), I have had the cards overheat on me. I wanted to walk everyone through a basic setup of my fans on the machine to see if I am doing anything wrong here. Please consult the horrible sketches below to see my current airflow setup(not at home to take a picture):
Inetrior Side View of Case:
----------------|
|PSU-----------|
| --------------|
|1-CPU---------|
|---------------|
|---------------|
|-vcard1------2|
|-vcard2-------|
-----------------
#1 = 120mm Exhaust Fan
#2 = 120mm Supply Fan
External Side Door of Case:
----------------|
|---------------|
|---------------|
|---2-----------|
|---------------|
|---------------|
|---1-----------|
|---------------|
-----------------
#1 = 80mm Exhaust Fan
#2 = 80mm Exhaust Fan
Please note that the door sketch goes directly on top of the other sketch. In other words, the exterior fans mount directly on top of the video cards and the CPU. Should I have the exterior fan#1 on top of the video cards supplying air instead of exhausting? Should I also open up some of the blank PCI slots between the two cards to encourage more air to escape out the back of the case? Any advice would be great.