Just so people know these can only be used in Dell computers. While the auction title clearly states that they are Dell brand, it should be further specified that they only work in Dell brand computers.
I have found that not all PCIE cards will not work in any mother boards, for dell has slightly changed some of there M.B.s just for dell. I had run into this problem on several different models of dell, and this is also true when changing AGP cards on a dell. Here's one I tried to put a AGP card into and it would not work that is the dell optiplex 745 core2duo 667 MHZ. H.P. also does this form time to time.
it is my understanding that you will need to put them in Dell computers only. If you don't have a Dell then you will want to consider my other auction.