Welcome to SPCR. Any gaming card with a TDP over 75W to 100W will need a fan to keep cool. So, the passive HD 7750 is ok, The passive Powercolor 7850 is not. The reviews show this card gets pretty hot and it's not as high clocked as the fanned versions. You might find this summary page useful. Than...

Hi, long time reader, first time poster. :) I ve got a Lian Li PC-60FN case with an i7-4770k processor cooled by a Noctua Cooler along with a Coolermaster 140mm fan in the front and a 120mm Gentle Typhoon as an exhaust. Both are connected to a lian li fan control switch and they are undervolted. I c...