Unplug and remove the fan. But please note that the fan is not native to speak and can not get into the video card . The computer must have enough space to install the cooler on videoobrabatyvayuschuyu fee. The presence of such a space is easy to estimate when removing the card.
To establish a new graphics card cooler . But first, connect it to 12 volts and assess the level of noise. This option is almost silent . Just pay attention to current consumption . It should not exceed the value of that consumed the home fans. It consumes 0.11A home , and the new 0.07 A. If you still want to put more power the fan , then do not connect it to a standard plug on the video card and power supply unit .
So how old is unlikely to be used , it can be cut off from his harness connector and soldered them to the new.
Set the video card in your computer.