Hi, I have a powermac g5 with a 128mb graphics card Radeon 9600 XT. I have bought two apple studio displays like this: http://www.finestcomputers.co.uk/FinC/Mac/StudioDisplay15/03.jpg And I want to run them on my powermac g5 so I can have one screen with logic and another with sibelius but my graphics card does not have 2 adc ports. it has one adc and another one that I have never seen before. Could someone tell what the other port on the Radeon 9600 XT 128mb is? Can I get an adapter to work? Thankyou very much!