No- DX11 is backwards compatible. If the game calls DX10 features, the card will only use DX10. It has the drivers and capability to run 11, but if the game doesn't call it it wont. Trying to downgrade might cause system problems, if the drivers even exist.
The only problem with DX10 only would be if you have a graphics card that can only handle DX9 as there is no DX9 support in the patch.
If you have DX10 card or DX11 card you are fine- you dont need to do anything, use the most up to date released drivers you can (usually from the ATI or NVidia website, go for full release, not beta ones).
Last edited by GraveyardJimmy; 05-08-2012 at 11:38 AM.
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