Why the Precision Mobile Workstation M4800 systems may not have a Switchable Graphics BIOS option

Why the Precision Mobile Workstation M4800 systems may not have a Switchable Graphics BIOS option



Article Summary: This article provides information on "Why the Precision Mobile Workstation M4800 systems may not have a Switchable Graphics BIOS option when ordered with QHD+ displays".


What is Switchable Graphics?

Many Dell portable systems have an option for switchable graphics that allows the system to utilize Intel Unified Memory Architecture (UMA) graphics for applications that do not require the Advanced Micro Devices (AMD) or nVidia dedicated graphics processors. This option is available as a power saving measure as the Intel UMA graphics are ideal for battery operation and other conditions where saving power is a preference.


Switchable Graphics is not available with a QHD+ and UHD displays.

The Precision Mobile Workstation M4800 system is one of the premier Dell portable systems. This system has four options when selecting the internal Liquid Crystal Display (LCD) display.

  • 15.6" High Definition (HD) Display (1366 x 768)
  • 15.6" Full High Definition (FHD) Display (1920 x 1080)
  • 15.6" Quad High Definition Plus (QHD+) (3200 x 1800)
  • 15.6" Ultra High Definition (UHD) (3280 x 2160)

The HD and FHD displays use a Low Voltage Differential Signal (LVDS) cabling connection between the graphics adapter and the LCD display. This cable uses an analog circuit to transmit the video data between the graphics adapter and the LCD.

The QHD+ & UHD displays have Embedded Display Port (eDP) cabling allowing for a direct digital connection between the graphics adapter and the LCD. Intel UMA graphics doesn't interface with this technology and is disabled as an option in the BIOS on systems with the QHD+ & UHD LCD displays.






Article ID: SLN285314

Last Date Modified: 06/01/2015 05:21 AM


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