I've been running my Tri-X with the stock fan profile for a couple of days to see how it does and It still idles at around 30/32, In the more demanding titles like Dying light it maxes at 75 degrees yet I still don't hear it over the low hum of the system fans. They are 4 x 12 cm quiet edition Corsair fans, 2 x 14 cm quiet edition Corsair fans and one 12cm Noctua Industrial. The Noctua's the noisiest fan at 29 dba and it's the only thing I can now hear (I might put a quiet edition back in it's place as I only got the Noctua to push more air at the 290x I had and I don't need it now, Then I can see if it's any quieter). The CPU Air cooler I use is a Be quiet model that also has a 12 cm fan on it. That idles around the 22 to 26 degree mark and under gaming load it's around 56 to 59. Everything runs at stock clocks as I don't see the need to overclock it for now.
It makes a nice change after the 80% whoosh of the Twin Frozer IV card when under heavy load.