Technical issues FAQ

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This FAQ covers technical issues related to getting Spiral Knights running on your computer. For information on optimizing performance of the game on your computer to reduce graphical lag, see the performance issues FAQ.


Does your computer meet the minimum requirements to run Spiral Knights?

If you don't know how to check these requirements, see the additional questions/answers below. Note: Laptops and Desktop onboard graphics controllers generally perform well below desktop video cards.

The minimum requirements are:

Windows & Linux

  • Windows XP, Vista or 7
  • Java 1.6
  • Display 1024x600
  • 1.3 GHz processor
  • Graphics: 64mb Video Memory. GeForce 5 series, ATI Radeon 8500. Latest video driver.
  • Memory: 512mb for Windows XP or 1gb for Windows Vista/7
  • 600MB Hard drive space


  • OSX 10.5
  • Java 1.6
  • Display 1024x600
  • 1.3 GHz processor
  • Graphics: 64MB Video Memory. GeForce 5 series, ATI 8500. Latest video driver.
  • 1GB memory (1000MB)
  • 600MB hard drive space

How do I figure out the hardware information for my computer?


Windows users can do the following:

  1. Click on the "Start" menu and then click on "Run."
  2. Type in "dxdiag" and click on "OK."
  3. In the first tab (System), you will find the "Operating System", "Processor" and the "Memory."
  4. In the third tab (Display), you will find the "Name" (video card name) and "Approx. Total Memory" (video card memory).

If that screen does not show the processor speed, you can also try this:

  1. From the Start menu, right-click Computer (My Computer in WinXP), then select "Properties."
  2. Your system information should include the processor speed in GHz.


Mac OSX users can do the following:

  1. Click the Apple icon in the top left, and select "About This Mac."
  2. In the "About This Mac" window, you will find the "Processor" and the "Memory."
  3. Then click the "More Info..." button in the "About This Mac" window.
  4. Under the Hardware category, select Graphics/Displays and you will find "VRAM (Total)" which is your video card memory.

What if my computer system barely meets the minimum requirements?

There are a few options you can change to make Spiral Knights run as smoothly as possible.

  • Change the Display Mode to it's minimum value.
  • Disable Fullscreen
  • Set Graphics Quality to Low
  • Under the Edit Advanced button:
    • Enable Compatibility Mode
    • Enable Cull Transients
    • Make sure Antialiasing Level is set to 1x

Be aware that older, integrated or laptop video cards might also lack the 3D acceleration to run Spiral Knights, even if they meet the minimum 64MB memory requirement. Minimum laptop/integrated video cards that are likely to work are GeForce Go 6600, ATI Mobility 9700 and Intel GMA X3100. However, a smooth and trouble free game play experience cannot be guaranteed.

I upgraded to Windows 8, why isn't Spiral Knights starting anymore?

Most current computers should be able to upgrade to Windows 8 and still play Spiral Knights properly. However, up to date graphics drivers are required since the Windows default driver cannot run Spiral Knights in most cases. There is a list of graphics cards that have been will not work or need a special driver to run Spiral Knights in Windows 8.

  • Intel integrated graphics from before the HD 2000 will not work.
  • ATI parts from before the Radeon HD 2000 series will not work.
  • ATI/AMD parts from Radeon HD 2000 series to Radeon HD 4000 series need this special driver release.
  • NVIDIA GeForce 5 series (not the 500 series!) will not work.

What if my computer system doesn't meet the minimum requirements?

Sorry, you won't be able to play Spiral Knights. If you want to play, you will need to consider upgrading your computer hardware. If your processor meets the minimum standard, but not the video and memory, these are both fairly cheap upgrades that can be done without upgrading the whole computer.

How do I know if my video card is running the latest video drivers?


Windows users can do the following:

  1. Click on the 'Start' menu and then click on 'Run'.
  2. Type in "dxdiag" and hit 'OK'.
  3. Clicking on the third tab ('Display'), you will find the 'Name' and 'Approx. Total Memory' of your video card.
  4. The 'Name' will tell you which manufacturer's site you need to go to for a driver update. Make sure you pick the driver matching your video card name and Operating System!

Some of the more common video drivers:


For Mac users, updated graphics drivers are included in Mac OS X updates:

  1. Click the Apple.
  2. On the "Apple" menu, click "Software Update."
  3. If there is a Mac OS X update available, you can install it. If there is a graphics driver update, it will be included in the Mac OS X update.

How do I know if I am running the latest Java release?

You can update your Java from the below sites according to your Operating System:

What do I do if something seems to be wrong with my Java version?

The order of installation is often important: uninstall Spiral Knights, install/upgrade your Java and then reinstall Spiral Knights.

What other issues should I check?


  • Default Windows XP Firewall. Add 'java.exe' and 'javaw.exe' to the list of allowed programs/exceptions.
  • Hardware Firewall/Router. Make sure traffic is allowed on ports 47624 through 47634 inclusive on both TCP and UDP.
  • Other Firewall Programs. Make sure the game server addresses are not blocked. There are too many game servers to list, but some sample addresses are:,,

For those not comfortable modifying their router's settings the program Simple Port Forwarding is a free program that can do this for you.

What's the whole list of everything I should try for Windows to make the game work?

Assuming your PC meets the minimum requirements (see question 1), the below refresh/upgrade routine is likely to address most known problems in one shot. Please do the following steps in the exact order listed:

  1. Uninstall Spiral Knights (if it was installed locally).
  2. Install the latest video drivers for your video card (see question 5).
  3. Download the latest Java (see question 6).
  4. Validate your firewall settings (see question 8).
  5. (Re)install Spiral Knights
    1. Windows download client
    2. Mac download client
    3. Linux download client

My keyboard input isn't being recognized when playing the game on Linux, what should I do?

The following things have worked for other players with this issue:

  • If you have SCIM installed, try disabling or removing it.
  • Edit the 'spiral' file in the download client and change the following line:
$JAVA $* -jar $INSTDIR/getdown-pro.jar $INSTDIR
XMODIFIERS=@im=none $JAVA $* -jar $INSTDIR/getdown-pro.jar $INSTDIR

Invalid Digest File or Unexpected End of File From Server

There are step by step instructions for how to fix this in the Spiral Knights Forums.

Other Issues?

  • This game does not support multi-video card setups. If have graphical errors using this setup this try disabling the additional video card(s).
  • If your web browser is creating problems running the game you can always try the downloadable install client found here.
  • Some people using Windows may need to run the game as Administrator. Simply right click on the link in the Start Menu or Desktop and select "Run as Administrator."
  • High CPU or GPU temperature can crash or slow the computer. Monitor the temperature of your CPU and other computer components to help keep them running properly and operating within safe temperature limits. There are several cooling methods in the market to help improve processor performance or reduce the noise of cooling fans.

What if I have a question or issue not covered by this FAQ?

You can create a new thread under the Technical Support forum listing your processor, memory (RAM), operating system, the name of the video card and its amount of video memory, and explain exactly what sort of problems you have.

While in Spiral Knights, you can send a bug report by pressing the F2 key or by using the /bug chat command and describing the game conditions when the bug occurs. This will also be helpful even if you had to start the game again, we may still get data on the issue that caused you to crash or have to restart the game.

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