Originally Posted by kevindd992002
Ehume, any ideas?
what you are describing is recirculation of hot exhaust air. it's not ideal, however when you inject cool air (TY140) it mixes with the hot exhaust air of the GPU and makes the average air temp cooler then the raw exhaust air. you DO recirculate back SOME of the heat, but the amount of heat recirculated depends on how well your airflow design is inside the case. if you have good airflow inside the case, the recirculated heat is kept to a minimal and the effect is negligible. however if you have poor airflow inside the case where the heat is trapped in the case, then you have a really big problem because the thermal short circuit created by the internal exhaust GPU will simply keep getting hotter.
this is the main reason why ehume recommends cutting out the rear grill with a nibbler to reduce airflow resistance so you don't have a heat pocket developing where you don't want heat to hang around. ehume believes in "positive air flow" regardless of pressure, however, personally i'm more of a positive pressure type of person and prefer to have some pressure so i can direct the airflow exactly where i want it to go by strategically placing exhaust ports. both methods work well for cooling, it's just a difference in opinion / methodology. ehume's method prevents any heat build up, my method accelerates airflow at strategic locations where heat tend to gather/linger w/o additional fans.