Did You remove black grid??
It has very small holes try to change it into something like this:
or more sophisticated :P
http://insanetek.com/reviews/case/KickButtComputers.com%20-%20Skull%20and%20Crossbones%20Theme/images/Picture%20010.jpg
It's may first post so any sugestion are welcome
My "new" computer configuration the same as in signature
some parts like cpu or psu are from previous config
but Tagan BZ will be soon insalled