gtx660 yosemite clover

Hi all, I have a GTX 660 (MSI TwinFrozr Gaming) with 2 screens, a 4K on the Displayport output, and a standard screen on the DVI one. Both are working fine with mavericks. (with only GraphicsEnabler=No in my boot.plist) I tried to install Yosemite (with Clover, I wanted to give it a try) but...