I would install DELL's AMD FIREPRO Driver even if it is very Out-Dated just to make sure everything works correctly with Dell's AMD Driver: Support for Precision M6600 | Drivers & Downloads | Dell US
Since you have an Intel APU Processor, The Intel Graphics Driver must be the latest version. Also you have a Urgent BIOS update. Make sure this is the exact same Laptop model you have before updating the BIOS.
Your FirePro M8900M is not supported with AMD driver updates anymore. Plus there are no Windows 10 drivers in case you have Windows 10 installed.
Here are the last drivers for your Mobile FirePro Laptop AMD driver: https://www.amd.com/en/support/professional-graphics/mobile-platforms/firepro-mobility-series/firepr...
NOTE: Why do you believe that the HD6970M driver would be compatible with the FirePro?