hmm i cant find a link to that card, BUT, dell's cooling unit for the cpu usually gets in the way of two slotted cards. if that card you suggested is only one slotted, then it will fit.
But, a problem might be that the psu that, that dell carries might not be sufficient enough for that card, so you wont be able to take advantage of that card's potential.
Just wait until the PSU pro's get a hand in this thread and they should inform you of the do's and dont's