Help !! - how do i improve screen resolution?

Hi, 

The XPS 8500 ships with integrated graphic (Standard) option, but the user can opt to buy a separate discrete graphics card.

You can check the graphic cards sent with XPS 8500:

• Integrated (UMA) — Intel HD Graphics 2500 (Core i5) and HD Graphics 4000 (Core i7)
• Discrete — nVidia GeForce GT620(Optional)
• Discrete — nVidia GeForce GT640(Optional)
• Discrete — AMD Radeon HD7570 (Optional)
• Discrete — AMD Radeon HD7770 (Optional)
• Discrete — AMD Radeon HD7870 (Optional) 

You can uninstall the video drivers installed on your computer and re install the drivers following the steps below: 

• Click on “Start” and right click on “Computer”.
• Click on “Manage”.
• Click on “Device Manager”.
• Under “Display adapters”, you will find the video driver listed.
• Right click on it and click on “uninstall”. (Check and make a note of the driver installed on your system and re-install the driver from the below steps accordingly).
• Check the box to delete the software.
• Restart your system and click on the below link: http://dell.to/S6zMW4
• Enter the Service Tag of your system and select the operating system.
• You will find the video driver under “Video”.
• Click on the video driver depending on the video card your system has. (Install the same video driver which you uninstalled from “Device Manager”.
• Click on “Download File”.
• Select “For Single File Download via Browser”.
• Click on “Download Now”.
• Save the driver on your desktop.
• Once the driver is saved on desktop, right click on it and select “Run as administrator”.
• Install the video driver by following the on screen instructions.

Please reply with the findings.