How do I get three monitors to work?
You can use the ATI "Three eye infinity technologie" with a active display port adaptateur to DVI-D (26€ for the Saphire model on EUR). It's work perfectly with only one Graphic card on a motherboard with only one PCI express 16x slot. The FPS is the same as 1 or 2 monitor.
http://www.sapphiretech.com/presentation/product/?cid=4&gid=1010&sgid=1011&pid=0&psn=000101&lid=3&leg=0