Just added one more fan still the same problem. Should the fan blow to the cards or away from the cards?
Depends on your setup and case.
Example: I have 3 fans blowing out, two on the top of the case, one on the top of the back plate. I have 1 intake on the front of the case blowing across my drives. I have passive intake holes on the side of my case right where my card is. So, passive air is sucked in due to the air flow in my case, takes the hot air from the card up to the fans blowing out. Easy setup since hot air rises.