I have an Apple Cinema 23" monitor with a DVI connector on it. It works fine on the Mac G5 we got it with. I have several PC's that also have DVI outputs that it works with. The Dell I REALLY want it to work on, it doesn't work. I get no video. I have a GeForce 8400 GS card in the Dell. The DVI out on the Dell works with other monitors just fine, just not the Apple monitor.