Because you did not specify what laptop or processor you are using, I just posted some generic links.
The Vega 8 graphics are part of the APU (processor). The APU is soldered to the motherboard and is not meant to be removed or replaced.
AMD Radeon RX Vega 8 GPU - Benchmarks and Specs - NotebookCheck.net Tech
http://www.cpu-world.com/CPUs/Zen/AMD-Ryzen%205%20Mobile%202500U.html
