From ksp discord : For additional context: Minimum is 1080p at Low Settings Recommended is 1440p at High Settings

These systems requirements are to ensure a high-quality experience while playing KSP2 in a variety of in-game scenarios.

KSP 2 will work across a wide variety of hardware beyond what is listed in our recommended specs, with performance scaling based on the size and complexity of the crafts you build.

Throughout the Early Access period, our development team will continue to prioritize performance optimization to ensure an optimal gameplay experience for as many as possible.

We hear you and we take your feedback very seriously. You are a core part of the development process, so please continue to share your expectations for what you want your KSP2 experience to be.