HAF922 Fan setup questions

kontrol

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May 5, 2010
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I'm changing my fan in my HAF922 because 2 are broken. I would like to get your input on what would be the best setup to do. Here's the picture of my case:

haf-922-Black-web_mat.jpg


Currenty there's a 200mm fan at the front as intake. One 120mm as exhaust at the rear and one 200mm at the top as exhaust also. The front and rear are broken. The top fan is still working.

After reading many topic, I decided I wanted to do a negative pressure setup (probably what was already in place) since I intend to overclock a bit and I play video games. Here's some question I have:

1. One thing came up very often and it was to "balance" the fan intake/exhaust. How balanced does it need to be? Like 2x more exhaust than intake to have negative pressure? Is it important?

2. I intend to replace the front 200mm and read 120mm by equivalent. During the process I could add more fan. What would you suggest. Would a 120mm intake fan at the bottom be a good addition? I can add one on the side panel too. I fear that adding one at the bottom as intake will turn my negative pressure build in a positive pressure.

3. If I add one 120mm intake at the bottom, should I replace the not broken 200m exhaust fan by 2 120mm (supported by the case) to have more exhaust and thus make sure this is negative pressure?

Any suggestion/input are welcome I'm kinda new to case fan managing

 
Just thinking about it, if I want to put a fan at the bottom and make sure I keep negative pressure, I could limit the bottom fan intake so the rear and top fan exhaust more?