ATLONA AT-DP400 Dual Link DVI to Mini DisplayPort Converter AT-DP400 is HDCP Compliant, which means that you can play copy protected material through our converter Supports Dual Link resolutions up to 2560x1600 or more common 2560x1440 used by iMac 27-inch or 27-inch LED True pixel to pixel signal Our converter is only hardware based, therefore will never have any issues with new operating systems or updates. The DP400 does not change frame rate or refresh rate, and does not scale video, preventing any delays or video artifacts