I have PowerMac Pro with Intel chips and ATI Radeon X1900 video graphics card and Apple Cinema Display but dont know how to connected them, Do you know how to convert the Apple ADC display output to DVI inexpensively? I see Apple wants $150 for theirs. Are there other vendors of this conversion? Where is a good place to buy it? I want to use an ADC display on my ATI Radeon X1900 XT it's a DVI video card output, please help THANK YOU VERY MUCH.