The cooler will work as long as your case can support its height so you 'd better check the specs of the cooler and your space in your case. Lack of intake and proper exhaust will decrease the tx3i efficiency proportional with time as the generated hot air won't be replaced with fresh cool air. Still you will see cooler temps compared to the stock Intel cooler. You can place two 92 mm fans on the CM and direct the air towards the back of the case to help ventilation.