Dell P2421DCc User Manual page 56

4. Click Advanced Settings.
5. Identify your graphics controller supplier from the description at the top of the
window (e.g. NVIDIA, ATI, Intel, and so on).
6. Refer to the graphic card provider website for updated driver (for example,
www.ATI.com
7. After installing the drivers for your graphics adapter, attempt to set the
resolution to 2560 x 1440 again.
│
56 Operating your monitor
OR www.AMD.com).