I don't have a clue what your describing with "d51s" but I can say with certainty that it's not a Graphics/Video Adapter. I'm thinking maybe you may have meant to type "EVO d510" (which is a desktop [small form factor] computer model). If you can tell me a correct model number, I might be able to help you.
This is the link to get drivers for the EVO d510 desktop model computer:
If it's not a EVO d510, then use this link to type in your model number (then click the next button):