Yes, you need to have the display drivers installed.

First, install Intel drivers from the below link:

https://downloadcenter.intel.com/Detail_Desc.aspx?DwnldID=23764&lang=eng&ProdId=3319

Then, if AMD graphics card is present, AMD drivers need  to be installed. Drivers are available from the following link:

http://support.amd.com/en-us/download

If nVidia graphics card is present, you can download the drivers from the below link:

http://www.nvidia.com/Download/index.aspx

Kindly note that beta drivers will have the highest version and latest date of release, but it is not recommended to use as it'll be still in development stage and may have multiple issues.

Thanks for your reply, but it didn't work... still gives me yellow mark on the device manager...

This device cannot start. (Code 10)

Provide the hardware IDs:

http://dellwindowsreinstallationguide.com/downloading-drivers-checking-hardware-ids-and-downloading-and-installing-dell-system-drivers-in-the-correct-order/

Hardware IDs

PCI\VEN_1002&DEV_6760&SUBSYS_04CA1028&REV_00
PCI\VEN_1002&DEV_6760&SUBSYS_04CA1028
PCI\VEN_1002&DEV_6760&CC_030000
PCI\VEN_1002&DEV_6760&CC_0300