Hello silencers! IÂ´ve been meaking some investments these days because I felt that something was not right with noctua fans.
Well, I think I can afirm that Noctua fans move a good amount of air when theyÂ´re alone over a table or sth like that, but not when theyÂ´re mounted in a computer, because these fans donÂ´t make almost any pression compared to nexus or similar. This lack of presion makes them move less air than others at the same rpm.
To prove this IÂ´ve made a comparison betwen a nexus at 7v and a noctua at 5v when theyÂ´re suposed to move the same amount of air.
this are my conclusions, maybe IÂ´ve done something wrong, IÂ´d like someone else to try the same experiment, maybe devon or someone with expeirience, donÂ´t know, but I think that way of measure cfm is not valid for the use of the fans in real life; use in heatsinks, and cases where air find obstacles that force the fan to push air not only to move it from noe side of a foam to another.
Nexus is running always at 7v (670 rpm and 27 cfm) and noctua at 5v (640 rpm and 30 cfm) noctua should win due to itÂ´s better airflow. I have some pics here.
this is the noctua at 5v in a noctua nh-u12
this one, the nexus at 7v in THE SAME computer everything is the same, both insances of prime were running for 1 hour
((temps from left to right begining in the black one reffer to: HD , GPU ambient , GPU memory , GPU diode , GPU , CPU core1 , CPU core2 , CPU , Motherboard. motherboard is a dfi ultra-d ))
At this point I was thinking that maybe noctua fans donÂ´t make enogh pressure so air canÂ´t go fluid through the heatsink. I believed that was the difference, nexus better for heatsinks and noctua to put air out of the case.
Anyway I tried again comparing noctua and nexus putting air out of the case. the only fan trowing that air out was one, first noctua then nexus. I blocked top vent and begin again.
noctua at 5v
core 1 56
core 2 56
now nexus at 7v temps here raise 0.5Âº in my room nothing important anyway
core 1 54
core 2 54
Thats all, iÂ´ll keep on investigating, IÂ´m going to buy or try to do sth to know exactly how fast my fans are spining just in case my nexus fan is somehow faster than usual...
I give you the link of the forum where i usually post, itÂ´s in spanish, but you can translate it with babelfish if you need to.
http://foro.noticias3d.com/vbulletin/sh ... p?t=176215
also this afternoon IÂ´ll try with antec tricool at low position (30 cfm)
What do you think about all this? And sorry fot my english, I donÂ´t usually use this language