Même problème que vous avec un crossfire de 2 x RadeonHD4870X2...
Le jeu donne ce lien:
http://forum.maniaplanet.com/viewtopic.php?f=215&t=5200&start=0
je cite:
Please note this message is intended for users of the final release of ManiaPlanet only.
CrossFire in ManiaPlanet is not directly supported by drivers yet.
Though, you can play with CrossFire enabled and efficient if you do the following points:
a) ManiaPlanet.exe is not seen as an AFR-Friendly game (performance will be very bad)
Solution:
In your ManiaPlanet install directory,
Copy our ManiaPlanet.exe file as "AFR-FriendlyD3D.exe"
Please check this copy is up to date with the ManiaPlanet.exe
(only ManiaPlanet.exe is kept up to date by the game updater)
To run the game, execute this file, please do not use the launcher's button "play"
or
Use RadeonPro tool to tweak game profile to "AFR-Friendly D3D"
http://www.radeonpro.info/
b) Graphic drivers do not support CrossFire for D3D9Ex interface (you can't enable CrossFire)
Solution:
Go to Launcher/Configure/Advanced/Compatibility/
Disable (uncheck) the "Enable D3D9Ex" checkbox.
J'ai essayé la solution b) mais sans résultat...
Je vais chercher à décrypter la méthode a) :D