The DZ68BC Does support 3 Displays while using Ivy Bridge CPU. I have DZ68BC & i7-3770 and i tested it my self even tho the board manual only states two displays will be used which only apply's to 2nd gen CPUs.
The Board also supports PCI-E gen 3 even tho its stated to be gen 2 all this is possible by using 3rd gen CPU
The Board has DVI-I, HDMI & Display Port
BUT CAUTION the Board is riddled with BIOS ISSUES There is no BIOS FIXED BIOS yet any BIOS from 0035, 0036, 0037 & 0039 have issues, unfortunately you need any of those to be able to run 3rd gen CPU.