Quote:
Originally Posted by freeloadingbum
If you have 4 empty PCI slots you can easily mount a 80mm fan there, works great
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I agree 100%, and even a modest powered 80mm fan will move far more air than those PCI slot blowers do.
With a second 80mm exhaust, then go with a 120mm intake fan where you showed down low. I'd not stack a second fan above myself, it looks like flow would be to restricted to gain you much. If you want a second intake you could do like colt45 said, put one in behind the MB tray. This would be even more restricted, but would cool the MB from behind, which would, I think, gain you more than a seoond one stacked above the lower 120mm would. But if you try one back of the MB I would go more than 80mm, anything more than that would gain nothing, as the restrictive area just isn't going to allow a very large cfm anyway.