I truly do not know what slot it is in at the time, I plugged it into an available PCI which I felt comfortable using I will take it to heart that it could be sharing with the AGP; although that would be extremely unusual to have gotten the program even to run and set up as far as it has..because I have seen them with no sign of the second monitor and brought all the way to working order. I have never seen the slot make a difference in getting multiple monitors initiated (which is far easier to say then to do, as it "IS" a monumental task to get them initiiated). Just hoping I will recall what I have to do at some point and get this working as I have been trying to get this initiated for about 8 months now..do not want to get involved in long distance telephone calls and feel someone must have the expertise...