How To Set Up Dual Monitors on Mavericks? (EVGA GTX 570HD)

Hello,

Yesterday I was finally able to install Maverick on my PC with the following specs

Intel Core i5 2500k
ASUS P8Z68-V PRO
EVGA GTX 570HD
8GB RAM
120GB SSD (Has Windows 7 installed)
1TB WD HDD (For Storage)
160GB WD HDD (Has Maverick installed)

It would only boot to OSX when I set GraphicsEnabler to Yes. I had some audio problems but I was able to fix that. But I still have one problem. I have two monitors, one Samsung (connected via HDMI to the graphics card), one ASUS (connected via DVI to the graphics card), both 21 inches. My problem is that I can't seem to get dual monitors to work. When I disconnect one then I get a signal to the other. When both are connected then both screens are black after the Apple logo. How do I fix this?

Thanks!

Sorry for a bump 3 weeks later but I would I hope someone would help me out.

I have the exact same problem with my GTX460.... Anyone knows how to fix that?