Pros: Runs incredibly cool, quiet, has a backplate, looks great, overclocks decently
Cons: Costs a bit more than reference, but absolutely worth it
Requires 6pin+8pin power connectors powered by a decent quality 500w+ PSU. For displays it supports 2xDVI, 1xHDMI and 1xDisplayport. Comes in a black box with thick packaging foam, power adapters, SLI bridge, driver CD (who even uses that?). Standard stuff.
Stock clocks are 889mhz core and 1502mhz memory. Allows voltage tweaking up to 1.2v with stock BIOS. I recommend using the latest MSI Afterburner or EVGA PrecisionX for tweaking, Asus GPU Tweak isn't particularly reliable or refined. Don't worry about hitting the 80c thermal target unless you live in a very hot area, as reviews show this card runs around 68-70c load @ stock clocks.
Automatic fan control works fine, but is a bit more on the conservative side with max speed around ~50%. It is recommended you tailor-make a custom fan curve based on your ambient temps and noise requirements, fans can be pushed to around 60-65% while staying relatively quiet. This is one quiet cooler!
A combination of Asus's new Cool-tech fan, Direct-Power bridge (lower current impedance), heatsink design, etc has all come together to make the coolest, quietest and one of the best-performing GTX780's of the lot. It can definitely be pushed further with a modded BIOS, but (as usual) do that at your own risk.
Asus GTX780 DirectCU II is currently available on Newegg for $519 USD. Hope my review helped