Is it better to suck or blow?

keakar · Sep 27, 2007

is it better for cpu coolers to have the fan blowing air into the fins and onto the board or suck air out of the fins and draw heat from the board through it? which way is best and why do you think so?

here is a picture of how it is usually set up:

panchoman · Sep 27, 2007

blowing in, no exceptions lol. you should have cold air blowing through the fins so that the air can pick up the heat as it goes through.

kwchang007 · Sep 27, 2007

Blowing in....it's like this. Take a fan up to a cold air source...then face it towards you so it's blowing on you. Then flip it around, you should feel a difference, the first time should have more air flowing. This is because the air is focused.

keakar · Sep 27, 2007

well what about a verticle set up like this one? does it matter then? better to push or pull?

panchoman · Sep 27, 2007

yes it does, the fan should be sucking from the air towards the intake fans, which should be in the right side of the case. and the hot air should be moving to the left side of the cooler and old through the exhuast fans.

keakar · Sep 27, 2007

panchoman said:
yes it does, the fan should be sucking from the air towards the intake fans, which should be in the right side of the case. and the hot air should be moving to the left side of the cooler and old through the exhuast fans.

so you mean it should still always be blowing into the fins but directed out towards the back of case or upwards towards the psu depending on how its mounted?

panchoman · Sep 27, 2007

yes, but usually its suppossed to be sucking from the front and out to the back, not sucking from the grafix card and heating up your psu

keakar · Sep 27, 2007

well with the first cooler i find a hard time believing the air in the case is that much cooler than the air that would be drawn up into the cooler from under the fins and pulling in air from around the board.

blowing air into the cooler, you are blowing hot air directly onto the heatpipes and the board heating them up and the air is then bounced off and upward. unless an air duct is used wouldnt this preheated air be drawn right back into the cooler?

FreedomEclipse · Sep 27, 2007

keakar said:
well with the first cooler i find a hard time believing the air in the case is that much cooler than the air that would be drawn up into the cooler from under the fins and pulling in air from around the board.

blowing air into the cooler, you are blowing hot air directly onto the heatpipes and the board heating them up and the air is then bounced off and upward. unless an air duct is used wouldnt this preheated air be drawn right back into the cooler?

dont forget that most people will either have a sidepanel or have a 80/92/120mm fan on the side of their case (maybe i was lucky - I have a 'hex mesh' sidepanel on my case)

Ive got the first one & I dont have any issues at all because its right next to my 120mm rear exhaust fan

tkpenalty · Sep 27, 2007

I would have even pressure in a case. But Negative if you cant balance it; as in suck. For that heatsink it should blow.

Fuse-Wire · Sep 27, 2007

i would have hot air being blown into the back of the case, an cold air being drawn from a fan port in the front over the fan n heatsink, but thats me and nothing i try works.

Widjaja · Sep 27, 2007

I had my heatsink shipped to me with the fan around the wrongway (blowing out) I didn't notice until later.
When I truned the fan around the right way the temps dropped 3-4deg if I can remember correctly.

d44ve · Sep 27, 2007

there is very little differance either way

EDIT : I misread what you wanted to knnow.

There is very little differance if you have the same ambient temp on both sides.... otherwise, you want to have which ever way is blow\pulling the coolest air

Deleted member 24505 · Sep 27, 2007

i dont personally like coolers that blow the hot air onto your mb.

Nicksterr · Sep 27, 2007

intake =p

Polaris573 · Sep 27, 2007

Please be mature and keep the thread on topic. All off topic posts have been edited or deleted.

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