1. It's an UHD 4K monitor. This puts you into the monster PC of say the minimum i7, GPU of RTX 2080 or better to game at 4K. Or the machine you see at https://www.youtube.com/watch?v=sCfmM71NOTo

2. Tip: If you don't have a monster PC then you could send it a 1080p signal until you get that killer gamer PC.

3. Please share what gamer PC you have. You might be far better off with a 2K or 1440p monitor.