System Specs

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General

Better hardware helps, but sometimes in non-obvious ways:

  • A fast (per core) CPU. Dual-core may help, but given the limitations of the Unity engine, more will do very little.
  • A dedicated graphics card (desktops & larger laptops)

KSP currently (1.0.5) does not make much use of multi core CPU's. However, with the imminence of 1.1, which comes with an engine upgrade, the full capability of your computer will soon be used. For the time, you will get a better performance with a CPU with good single core performance and high clock speed. At some point the game also seems to hit a limit on whats possible so there's not much difference between 2 high-end CPUs running an extremely big space station.

The same is true of spacecraft design:

  • Fewer parts, especially struts.
  • Avoid highly detailed 3rd party parts.
  • Keep installed part counts low.

Current Paid (1.1.3, Unity 5)

Minimum:

  • Processor:Core 2 Duo
  • Memory:3 GB RAM
  • Graphics:SM3 512MB VRAM
  • Hard Drive:1 GB HD space
  • One of the following OSes:
    • Windows XP SP2, Vista, 7, 8 or 10
    • Mac OS X 10.8 or higher
    • A Debian-based Linux distro. The game will also work with many other distros (such as Ubuntu, Mint, Arch, Fedora(rpm), or Gentoo).

Recommended:

  • Processor:Core i5 or higher
  • Memory:4 GB RAM
  • Graphics:SM4 1GB VRAM
  • Hard Drive:2 GB HD space
  • One of the following OSes:
    • Windows Vista, 7, 8 or 10
    • Mac OS X 10.8 or higher
    • A Debian-based Linux distro. The game will also work with many other distros (such as Ubuntu, Mint, Arch, Fedora(rpm), or Gentoo).

Previous Paid Paid (1.0.5, Unity 4)

Minimum:

  • Processor:Core 2 Duo
  • Memory:3 GB RAM
  • Graphics:SM3 512MB VRAM
  • Hard Drive:1 GB HD space
  • One of the following OSes:
    • Windows XP, Vista, 7, 8 or 10
    • Mac OS X 10.6 or higher
    • A Debian-based Linux distro. The game will also work with many other distros (such as Ubuntu, Mint, Arch, Fedora(rpm), or Gentoo).

Recommended:

  • Processor:Core i5
  • Memory:4 GB RAM
  • Graphics:SM4 1GB VRAM
  • Hard Drive:2 GB HD space
  • One of the following OSes:
    • Windows XP, Vista, 7, 8 or 10
    • Mac OS X 10.6 or higher
    • A Debian-based Linux distro. The game will also work with many other distros (such as Ubuntu, Mint, Arch, Fedora(rpm), or Gentoo).

e.g. mid-2009 MacBook Pro w/ dedicated graphics

Current Demo (1.0)

Minimum:

  • Intel Core2Duo or equivalent.
  • 2 GB of RAM
  • 512MB vidoe card, shader model 3.0
  • 1GB Free HD space
  • One of the following OSes:
    • Windows Vista, 7 or 8
    • Mac OS X 10.6 or higher
    • A Debian-based Linux distro.

Previous Demo (0.18.3)

Minimum:

  • Intel Core2Duo or equivalent.
  • 2 GB of RAM (4 recommended).
  • Intel HD3000 or better (Dedicated video card highly recommended).
  • 1GB Free HD space
  • One of the following OSes:
    • Windows XP, Vista, 7 or 8
    • Mac OS X 10.6 or higher
    • A Debian-based Linux distro. The game will also work with many other distros (such as Ubuntu, Mint, Arch, Fedora(rpm), or Gentoo).

This is the absolute minimum to get a playable (if slow) game with smallish rockets, however. A faster system will greatly enhance one's experience.