Is This Gaming PC Configuration Good for 4K Gaming?

I would reconsider the case you chose. It can be a little tight fitting larger GPUs since it's not the deepest case out there. You might want to look at updated options for better airflow or dimension.

This is literally one of the best builds you can get right now! Make sure you've got a good monitor to pair with it—ideally an OLED, if you're looking to spend more. Just double-check your monitor is up to the task because what you have is a beast!

Overall, this build is fantastic! If you want to squeeze out a bit more performance, swapping the 9800X3D for the 9950X3D is an option, though it may not be worth the price difference for gaming. Just keep in mind that a stronger cooler isn't necessary since the Peerless Assassin is capable. This setup will truly future-proof your gaming experience.

I think your friend's recommendations are solid! The components selected, especially the GPU and CPU, are top-tier for 4K gaming. You could save some cash by opting for a 4th gen SSD instead of the 5th, but for gaming, there's virtually no difference. The cooler you've picked is one of the best for performance per dollar unless you want to spend extra on an AIO cooler for aesthetics. Overall, it looks good; just a few minor tweaks can optimize costs without harming performance.

This setup is amazing! Just one suggestion: if you plan to store a lot of games, consider adding another M.2 SSD. But if you frequently delete and reinstall games, 2TB should suffice for your needs.