Re: Nvidia 5200 and wide screen
You are probably trying to use a DVI cable.
Officially this is not possible because the 5200 cards normally have a pixel clock limit of 135 MHz and those screens require something near 155 MHz pixel clock to display at 60 Hz refresh rate.
You can use a lower refresh rate, or a special option (see section L of the README) to disable the check for the maximal pixel clock. This is out-of-spec but it usually just works.
You can also use a VGA cable, this will have no problem at all to reach that resolution.