Welcome to the forums! (at least a couple days ago)
I also assume you mean Ryzen 3400G?
Problem is this is a very misused term, and no one can really answer, at least not without a lot of details.
EVERY system has a a limitation, and that limitation moves constantly based on what you are doing and ultimately, there is rarely anything wrong with a bottleneck.
In CPU intensive applications, your CPU will be a limit. In GPU intensive applications, your GPU will be a limit.
For example, if you only plan on gaming at 1080p resolution, then it's usually pretty pointless buying anything above 2060/2070. Every system has a limit, and it's never the same in all applications.
- What is your friends monitor resolution and refresh rate?
- What applications are they using? If games, what games?
- What do they currently what to achieve?
- What is their PSU make and model?