Fanless PCIe Graphics Cards from Asus and Aopen
 

Finding a good fanless graphics card can be a bit of a challenge. There are lots of them around, but the majority are entry-level cards. Then there's the ever-present question of reliability. It's one thing to slap a fanless heatsink on a powerful card; it's another thing for that heatsink to perform well enough to cool it under stressful conditions in a real computer. Fanless cards must rely on system airflow to move heat away from them, and it's no simple trick to design a passive heatsink that works well under a wide range of airflow conditions.