Can you run TechPower GPU-Z to get the exact model of your card? Is this a Laptop and Laptop Model?
If you are using a Laptop and it is using an Intel APU then you can download the driver for your HD76xxM GPU card from here: https://www.amd.com/en/support
All the HD 76xxM Drivers are the same because your GPU card is considered to be legacy and not supported by AMD with anymore Driver Updates.
So you have a choice of two last driver updates:
1- WHQL - 2015
2- BETA - 2016.
BUT if you have a laptop with an AMD APU you must download the AMD APU Driver which will install automatically the HD76xxM GPU driver.
Here is how to install the AMD Laptop drivers: https://community.amd.com/thread/207699