I have a Dell Vostro 220 and my OS is windows 7. I need now to add a 2nd monitor, but the present pc has only 1 monitor port. Can someone please advise what sort of graphics or video card (not sure what it is called, so please correct me if I am wrong) I would need to install in the Dell so that I could connect the 2nd monitor thru a DVI port on the card to be bought. Hope u could please suggest the make and also give me the link. Thank u.