To prevent your flat-panel display from scaling
From the NVIDIA Control Panel navigation tree pane, under Display, click Adjust desktop size and position to open the associated page.
Click the image that represents your flat panel display, or non-HD digital display connected to the HDMI, DisplayPort, or DVI connector.
Note: Windows Vista and later: If applicable, click the Scaling tab.
Windows XP: Select Do not scale.
Windows Vista and later: Select No scaling.
Click Apply.