Should we state some facts and weed out the trolls?
Do the 290/290x/780/Titan all offer quiet performance at stock, yes.
Is the 290x ahead of Titan at stock and the 290 ahead of the 780 at stock at low noise levels, yes.
Do all 4 cards throttle at various times at stock, yes.
Do all 4 cards have the capability to have their fans turned up for more performance and less throttling, yes.
Do all 4 cards have the capability of throttling less, running cooler and overclocking further with 3rd party cooling, yes.
Are AMD cards categorically priced under Nvidia cards and in fact caused Nvidia prices to drop significantly to where they are now anyway(realistically talking here about 780ti being introduced rather than Titan to be dropped to £500 and upsetting all those who bought them), yes.
Is the Titan/780gtx cooler SO good that it ends up faster than the 290x, no, does it still throttle, yes, is it any where near as good as third party coolers, no, so can the stock Titan/780gtx cooler therefore easily be improved on.... yes.
So to sum up, 780gtx cooler is NOT the pinnacle of cooling, it does not prevent thermal throttling and third party cooling is significantly better. The 290x is not the pinnacle of cooling, it does not prevent thermal throttling and third party cooling is significantly better.
But Nvidia are great and AMD failed? Yes, the trolling/fanboyism is insanely clear to see.
Could AMD have made the cooler £20 better and cool better, yes, could Nvidia, yes, but what was to stop both companies making it £40 better, or £60 better, or £100 better, nothing. Where do you stop exactly?
There isn't a card produced in the past decade that couldn't have had a better air cooler installed at stock and produced a better and faster overall card...... this is not a problem for Nvidia cards, just AMD cards, despite being in identical situations.
If we actually get down to the physics of the situation, a larger core with the same power output is significantly easier to cool. The 780gtx/titan/ti is 26% larger, that is 26% more area to transfer heat into the cooler, it is literally easier to cool and you literally can't say one
cooler is better than another unless they are being used on the same heat source.