lol I cant hear the 770 at all. even when oced it runs in the mid 60s during benchmarks while being as quiet as can be. of course its cool in my room now so I expect maybe 70 during the summer.
The 770s have the same reference board as the 780s which is required to fit the Titan cooler on it. The other result of this is the fact that AIBs can just use their solutions from the 780 on their 770s.
Both the reference Titan cooler and the coolers that are equivalent or better (Nvidia Greenlight Program assures it for the 780, so if the same cooler is on the 770, this applies) will have no problem with a 770's level of wattage.