i got this xfx double dissipation which is BLOWING THE AIRFLOW INTO RANDOM DIRECTIONS :S
Dont get it if you acually care about airflow!!!
It has got 1 fan sucking and 1 fan blowing. Its not even exhausting hot air out of your case. Maybe a little, just by accident.
Edit: I think it even has locked voltages.
Edit2: And no bios switch.