I just installed an ATI 5770 in my early 2008 MacPro. I have two NEC 23" monitors that have DVI-D connectors. The monitor connected via the DVI-D connector is working fine. The other monitor is connected via one of the Mini Display ports via a KANEX Mini DisplayPort to DVI adapter and is not working. Any ideas? Do I have to download a driver? I really appreciate some ideas. Thanks.