Portal 2 > General Discussions > Topic Details
A Wild Pug Dec 31, 2012 @ 4:30pm
Lag ruins the game. My graphics card is crappy. Any ways to reduce lag?
Any console commands?
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Orange Bitflip Dec 31, 2012 @ 6:07pm 
Well, to start, turn your antialiasing off and turn effects down.
You can also turn texture resolution down and it will help.

You can also set P2 to use an older version of DirectX, which will speed it up quite a bit, but make it look horrible. This overrides many modern effects.
-dxlevel 80
-dxlevel 81
in your launch options will start P2 in DirectX 8, the oldest version still supported by the Source engine.

See https://support.steampowered.com/kb_article.php?ref=1040-JWMT-2947
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Date Posted: Dec 31, 2012 @ 4:30pm
Posts: 1