GTX 900 series is really sick. It's funny when you think, that not so long ago AMD was screaming with their 7000 series GHz edition cards and now these are going over 1.5 GHz.
Either way, both cards look beastly and probably a bit too beastly, to be honest, because 900 series is so effective, you don't really need such huge coolers, but, its always fun to have a beast under the hood, so, kudos to ZOTAC for making such insane looking cards.
EXTREME edition looks like it was brought here by aliens from another planet.