I have purchased an Asus G73jh laptop with the ATI Mobility Radeon HD 5870 video card which by the specifications supports integrated dual-link DVI output with HDCP (Max Resol. 2560 x 1600). I have an Apple 30" Cinema display. The max resolution is 1280 x 800. I am using an adapter female DVI-D dual link to male HDMI which goes into the laptop. I am running Windows 7 64 bit Home version. What am I missing? Why is the max resolution not being achieved?