Originally Posted by sexybastard
LOL I just did the same thing to the same dell case. Instead of the 6990 I used a 4870X2... but still very similar since they are both dual GPU cards.
As for cooling, in my case I didn't need to add a large side fan since I removed that mesh from the front and added a 120mm fan. It allows good airflow and since the case is short its pretty much direct. There are vents undeneath the dell logo and also on the bottom of the front panel so its able to get fresh air.
Lol, that is awesome, I like what you did. I think the 6990 is longer than the 4870x2 in my case...but this case actually has about 13.4 inches of clearance from the pci-slot, and the 6990 is only about a foot long. If you mount the intake fan on the inside of the case in the front then you lose clearance. So I just position the fan on the outside of the case with the cover on. Had to drill three holes however. I then mounted the fan:
I had to file down a little bit of the plastic on the inside of the front cover for the fan to fit perfect. No big deal. End result: