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Originally Posted by thorilan
pulling through dense finned rads and cores in general is slightly easyer than pushing due to leading edge rebound . the amount of diference it makes in a home cooling unit is not something that really makes much diference but when put together with other factors such as air from the outside coming into the case ( lowering your Dt) and fan pressure at low speeds ( you dont want your ears to bleed at max speed do you?) can all add up to a noticeable diference.
for instance pulling air from the outside of the case will usually be slightly cooler meaning your rad will get the cooler air and be more efficient.
then there is velocity. sealing the fans so that all the air has to come through the core/rad and not some cracks means more air per volume which would be the same as more flow inside your water cooling loop ( granted this is not a big deal).
but aside from all the scientific factors , it also comes down to personal preferance .
if you listen to your fan in push and then in pull its quite likely that you might hear a small diference in pitch / tone. this may be covered up by your case but in high powered cooling systems it can become noticeable
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thorilan,
Glad to see your post. I am getting ready to order a U2-UFO case and a PA120.3 rad with shroud to go inside. I am planning on drawing air from outside the case so would you recommend a push through the shroud to rad or pull?
Thanks,
John