There seems to be two different categories of VGA cooler that manufacturers install at the factory. The one with the casing that directs airflow through the heatsink and out of the computer case like this and the sort that just impels air onto the heatsink and allows it to disperse in the case like this. I am wondering, which is the best and most reliable type? The case that I am getting is very large and is supposed to circulate air well. Your input is very much appreciated!