View Full Version : push, pull or both?

07-27-04, 10:01 PM
Ok I have my JR-120 rad setup with two 120 mm fans on it, one pushing and the other pulling out the end, does it work better with 1 push, one pull or both? thanks!

07-27-04, 10:03 PM
i'd say pull or both

not sure how much having both helps, but test it out for us please!

07-27-04, 10:07 PM
Well, normally I would test it out and tell yah the results, but the fans on there now are very tough to get on or off i had to rig em up pretty good, very interesting :bang head :bang head process thats why i am asking you guys, cause if it makes that big of a difference i am going to remove or leave whatever so it works better

07-27-04, 10:17 PM
i'm sure push/pull is better than just pulling, so if it's all set up there's no reason to go tinkering with it

07-27-04, 10:19 PM
push/pull is a waste pretty much, only makes more noise

just do one or the other, whichever gets access to colder air

07-27-04, 10:20 PM
I would imagine that pull is good but "both" is the best. Even if it does not give a high performance increase it still gives an increase.

07-27-04, 10:23 PM
Having done all three with that core, push/pull gave the best temps, followed by pull, and finally push.

i'm sure push/pull is better than just pulling, so if it's all set up there's no reason to go tinkering with it

If its not broken... don't fix it.

07-27-04, 10:31 PM
If its not broken... don't fix it.

hehe thats what i was thinking, but i was hoping to drop my temps a dgree or so, just askin the guru's :) :) :)

07-27-04, 10:43 PM
Several fans were tested at 12 and 7V, both singly and in a push-pull configuration.Running two Panaflo FBA08A12 fans at 12V instead of one increased the heat dissipation by 17%, while running the two Panaflo fans at 7V produced no gain at all compared to the single fan at the same voltage..

the guru himself?

assume .02c/w for a GOOD rad

that's .004c/w change

or .4C at 100w heatload

so, count on no change at ~7v, and about .5C in push-pull at 12v.

07-27-04, 11:55 PM
I don't have much proof to back me up but I agree with Greenman100. Too many fans just add to the noise and from the article that he posted, you don't have that much gain in performance. I plan to do a push configuration where I'm pushing cold air from outside in from top of case with 2X120mm fans for my fedco 2-302 hc and then have another 120mm fan to push warm air out at the rear of case.