do two fans stacked work.

[vanniko63]

i have 3 fan radiator, which is placed on top of case .the 3 fans are on top pulling ,now the radiator is cooling 2 gpu,s and mobo chip set .at times it get hot still ,i recently add a shroud to place on top of fans .but did not produce any benefit other then top of pc looks nicer . with the addition of 3 fan shroud .i now have space between fan and shroud. i contacted koolance they recommend that fans be attached to shroud .so i ordered a spacer .i plan on attaching spacer to radiator the fan on top then shroud .i do hope that i will get some performance .but when i order that shroud all it was is a fan case with out blades .for say .so why not just add two fans stacked .is this possible .meaning will i get additional cooling .i researched on line not much .i did come across video on you tube which one person added 40 fans meaning 20 on each side 10 on each stack ,all same and was getting temps in negative was impressive .but not for me .so will two fans stacked on 3 fan radiator give me additional cooling .
i7-3770k
asus max v extreme
1200 corsair power supply
2 gpu sapphire 290-x
xspc 3 fan radiator with d5 pump .mongoose resiverior .cooling gpu,s and mobo .

 

[clarkjd]

If you had one on each side of the radiator, (i.e. one on the air input side and one on the output side, then maybe. If both fans are on the same side of the rad, then no. A fan can only push so much air around, if you add a second fan, then it becomes a restriction. Putting them on both sides of the radiator, the output fan removes the warm air off the rad, and the input fan feeds cool air to the rad. The radiator is, of course, the restriction in the airflow, and the second fan is to overcome that restriction.


Edit: typo and for clarification.

 

[Mr5oh]

The stack of 40 fans video is a hoax.

You don't have much to gain by adding more fans. Generally a push/pull setup on a radiator or heatsink is only worth 1-2 degrees.

You are much better off making sure you are using quality fans, that are correctly designed / type for your application than adding fans.

Just for reference, I'm running a push/pull setup, and on radiator, and now back to a heatsink. Yes it's a difference, but not a huge enough difference for me to recommend it.

 

[makkem]

Hi
Two fans stacked together will increase the air pressure that the fans will achieve but will not increase the amount of airflow so unless the radiators are severely restricting the air then the stacked fans will not increase the cooling.
See here ; http://