CPU

Product FRED said:

seekermeister said:

Product FRED said:

You contradicted yourself. Fire feeds off of oxygen. Draw the oxygen away, suck the air away.

You are not actually sucking the air away, because the air that is exhausted is replaced by fresh air coming from between the fins.

Exactly. Cool air. By sucking the air away from the heatsink, you're creating suction, drawing in cool air as you push the hot air out of the case through the rear fan.

We are going in circles here. Regardless of the direction of flow, the air is cooler when entering and warmer when leaving. Either way, the air is not being forced out of the case by this fan, it is directed by the main intake and exhaust fans, which creat a circulation across the CPU.

When I asked about how you came to this conclusion, I did not mean to simply explain your reasoning. I wanted to know if you had read something about this, that you could link to, or if you had made a hands on experiment and measured a temperature differential yourself.

Product FRED said:

seekermeister said:

Product FRED said:

Exactly. Cool air. By sucking the air away from the heatsink, you're creating suction, drawing in cool air as you push the hot air out of the case through the rear fan.

We are going in circles here. Regardless of the direction of flow, the air is cooler when entering and warmer when leaving. Either way, the air is not being forced out of the case by this fan, it is directed by the main intake and exhaust fans, which creat a circulation across the CPU.

When I asked about how you came to this conclusion, I did not mean to simply explain your reasoning. I wanted to know if you had read something about this, that you could link to, or if you had made a hands on experiment and measured a temperature differential yourself.

Yes, actually I did. I've read mixed responses, but the ones that agree with my statement make more sense. The air flows like you said: Cool in, Hot out. By blowing the air, you're not cooling it, you're just moving it back towards the fan. So the air is still hot, still in the heat sink, and not circulating, or at least not efficiently.

You have read mixed responses...that sounds as though what you read was other forum threads on the subject, rather than some kind of expert analysis. Despite the fact that I find flaws in your reasoning, I shall not debate them, because it would serve no purpose.

I agree, everyone is entitled to their opinions, and they are entitled to express them, but I prefer to know and understand the nature of what a person says, whether it is simply opinion, or something more substantial.

Along the lines of personal opinion or perspective, I have been thinking about your vacuum fan arrangement. Obviously, what counts is the amount of heat that is imparted to the airstream, and since the majority of the heat is going to be at the base of the fins, nearest the CPU, it would seem that the amount of air that comes in cantact at that point would be a critical factor in cooling. Since the vacuum fan would be pulling air laterally along the full length of the fins, some of the airflow would never have contacted the base area. Plus there would be a point between these lateral flows, near the base, that would be either a dead zone or an eddy, which would not conduct heat as well as a fan blasting directly and evenly on it.

Either way, the air is cooler coming in, than going out. The crux is which direction is permitting the air to absorb more heat? The question is somewhat rhetorical, unless you have something to add that you haven't already said.