I want to connect an Eizo monitor to a Windows 7 computer. It is connected through a DVI-D single link cable, plugged into the single link DVI-D port. When setting the screen resolution to 2560x1440, the screen gets all blurry and unreadable. How can I solve this? Do I need to plug the cable into the dual link port?
From Wikipedia article on DVI:
In single-link mode, the maximum pixel clock frequency is 165 MHz that supports a maximum resolution of 2.75 megapixels (including blanking interval) at 60 Hz refresh. For practical purposes, this allows a maximum 16:10 screen resolution of 1920×1200 at 60 Hz.
To support higher-resolution display devices, the DVI specification contains a provision for dual link. Dual-link DVI doubles the number of TMDS pairs, effectively doubling the video bandwidth. As a result, higher resolutions up to 2560 × 1600 are supported at 60 Hz.