Hi, has anyone got a suggestion for the following problem: I have 2 imacs and a mac mini. LEFTIE is a 7.1 with a ATI Radeon HD2600 with 256MB RAM, and RIGHTIE is a 8.1 with NVIDIA GeFORCE 8800 GS with 512MB RAM Mac mini is brand new. I have just purchased 3 x LG L246WHX monitors. NO matter which one I connect via DVI - HDMI to RIGHTIE the max resolution on the second monitor is 1920 x 1080 although RIGHTIE is still 1920 x 1200, but all of the monitors work just fine on LEFTIE at 1920 x 1200 and on the mac mini. Any ideas? Thanks in advance.