The first picture - DVI-I dual link connector on a cable
Second picture - DVI-D dual link connector on a monitor.
They are standard.
A DVI-I cable does not work with DVI-D ports.
A DVI-D cable does work with DVI-I ports.
And to continue...
A DVI-I dual link cable does not work with DVI-I single link ports.
Same for DVI-D.
If you check
http://cdn.overclock.net/d/d6/d62b2dd9_7801.dvid.gif
it's easy to understand.