Ok, first of all I have an Antec 902 that came with (rather ugly) vented PCI slot covers. I also have some spare solid black PCI slot covers that look much better. Here are 2 pictures showing the way things are setup now A problem I am experiencing is that the PSU fan (I assume) is causing dust to get sucked in through the bottom 3 vented PCI slots. This could be another problem because obviously the air being vented out of the back of the PSU is warm so that means the case is sucking warm air back into it. I don't use a side panel fan on my case (temps actually got worse when I tried) but I still have that hole there with a filter. What I would like to happen would be that any additional air that is not supplied by my intake fans be sucked in through the filter on the side panel. Would using solid PCI Slot covers help this without disrupting the rest of the airflow? Thanks for any help.