Eyefinity on Radeon HD 5870 1GB VersionThe following have been confirmed:
1. 5870 1GB that was released recently does NOT support more than two DVI monitors
2. To use eyefinity, 3rd monitor must support DisplayPort
3. You cannot use passive DP to DVI/HDMI adapter (<$20)
4. You can use an active DP to DVI/HDMI (>$100), which converts the signal for you
5. This is a hardware limitation, so it will stay this way
6. We still dont know whether future editions of 5870 will include a 3rd DVI/HDMI
So what's the big deal?
The hype over eyefinity was that it supports multimonitor gaming without another expensive converting box such as triplehead2go, and that it'll be more user friendly because its a package deal. Many of us assumed that you can use a cheap passive DP to DVI adapter so that our DVI/HDMI monitors would just work. But it didn't work like that, and people got pissed off after it's release, such as me.
The big issues are: there are very few monitors with DP that targets the main stream consumers, and an active DP to DVI adapter is over $100.
http://www.overclock.net/ati/581169-...t-support.html 
AMD's EyeFinity REQUIRES Monitor with DisplayPort if you want 3 Displays!
AMD's EyeFinity REQUIRES Monitor with DisplayPort if you want 3 Displays! 
