If your laptop has a AMD APU (Processor with Integrated Graphics) then you MUST download the APU mobile AMD driver which will automatically install both the Integrated and Discrete GPU drivers in your laptop.
If you have an Intel Laptop then you need to be sure your Intel APU driver is the latest with the latest BIOS and CHIPSET installed.
AMD Download page is showing only two 6700M series gpu cards - 6730m & 6770M. Both use the same AMD mobile driver.
The 6700M series GPU card are not supported by AMD anymore with Driver updates so you only have a choice of two of the last driver to choose from:
1-WHQL 2015
2-BETA 2016
You can download the driver from here: https://www.amd.com/en/support/graphics/amd-radeon-hd/amd-radeon-hd-6000m-series/amd-radeon-hd-6770m
