HSF air flow question

noobuilder1

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Mar 23, 2013
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Ok looking at most HSF, stock or otherwise most blow down through the heat sink. Wouldn't be better to pull air through the sink, through the fan and into the "slipstream" of air from front intake fan to rear exhaust fan?

1. The hot air would not be recycled by being exhausted and deflected by, say the ram stick and get re-sucked in by the fan.

2. You could get cooler air across the VRF and other heat sinks around your socket.

3. I could see how the cooling may not be as effective by more passive cooling of the air just being sucked past the CPU heat sink and not blown directly onto it.


Am I way off base or what? Thoughts?
 

HillBillyAsian

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Apr 4, 2013
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It depends. Lets say you have a hyper 212 and a mobo that has a cpu closer to the rear of the case. if were pulling air through the heatsink it could be making a deadzone because the exhaust fan on the back would also be pulling, most likely at a different RPM. The push method works better in 2 ways. It cools your RAM a little, while still cooling your cpu you arent looking at a 20C difference if you happen to have another fan lets say on the front of the case pushing air to the cpu fan nor would you see more then a 1-2C difference if you isolated the ram and other components from the HSF. the main way of cooling is making sure there is open airflow where cables arent really obstructing the path, ambient (room temperature), is it stock speeds, the speed and size of the fans, and dust.
 

noobuilder1

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I see your point but I should have been more clear I was talking about stock style rather then tower style. But on the tower I would think pull on the, lets say the hyper 212, and pair it up with a slightly more powerful rear exhaust fan for more focused air hot air flow out of the case. Or not?