The card Itself will support multi-monitor within windows as well as Eyefinity for gaming. If it is just windows apps (Office, Photoshop, etc) than it will more than suit your needs. If it's Eyefinity Gaming you are looking for, the card is probably underpowered for the resolutions required. Also of note, the card has 2x DVI, 1x HDMI, and 1x Displayport connecters, so choose your monitors wisely.
Here are my opinions based on my current usage of the card:
Gaming/Movies on an HDTV - Excellent performance
Multi-monitor Windows (1 1680x1050, 1 1280x1024) - excellent performance
gaming at 1680x1050 - medium to high details DX9, 10 and 11 - good performance overall, some heavy duty games make me turn down detail to achieve decent framerate.
Have not even tried Eyefinity, My monitors are a mixed bag of old and new, and I do not have any that support displayport. It's not like you can take 3 15' 1024x768 CRTs and breathe new life into them. Not without spending a whack of $$ on powered adapters, etc.
Hope that helps.