failed to create d3d device windows 7

[Joe Gatto]

i have a Radeon 6770 graphics card and i did a windows update and my drivers are upto date what do i do

[Joe Gatto]

portal 2

[Joe Gatto]

didnt work

[Tev]

Αναρτήθηκε αρχικά από Steam Support:

This error commonly occurs with only the following ATI graphics cards:

• Radeon X300
  
• Radeon X700
  
• Radeon X800
  
• Radeon 9###

Before updating your drivers, please visit Windows Update[www.update.microsoft.com] and make sure that you have all of the critical updates and the .NET framework installed.

If you get a Failed to create D3D device error and are using any of the above ATI Cards, please update your drivers to the latest version of Catalyst by visiting the ATI driver page.[support.amd.com]

If you use a Nvidia or any other type of video card, please visit the manufacturer's website for the latest video card drivers.

If the crash persists, set the following launch option:

Go to Steam's Library.
Right-click on the affected game.
Go to Properties > General > Set launch options...
Type in -dxlevel 81.
Click OK.

Note: if you are attempting to play Left 4 Dead, Left 4 Dead 2, Portal 2, or Counter-Strike: Global Offensive, you must set your launch option to -dxlevel 90 instead.

Source: https://support.steampowered.com/kb_article.php?p_faqid=772
Hopefully, this will fix your issue.