Hi, Im being a bit stupid and cant figure out which cable to use to connect two DVI equipped Dell U2711 monitors to my 2010 mac pro - is it the ridiculously overpriced mini display port to dual link DVI I require (as in using two 30" ACD's) or do I have to buy another graphics card and use like the 24" ACD's. Please help, I have searched everywhere and cant quite figure this out. Thanks. grahics card is nvidia geforce gt120 512 mb. Dell has dual dvi ports on each monitor.