Which side is up with a case fan?

  • Thread starter Thread starter DBMaster
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DBMaster

I have a couple of Logisys 120mm clear case fans. I am trying t
determine which side is "up", so to speak. On black cas
fans there are arror markers to tell you which direction the fa
turns and the direction of the airflow. There is no morkings on th
clear fans. Am I just missing the obvious and I should just connec
them and feel which way the wind blows? I must caution that I di
try that and the temp inside the computer got up to 159F before ther
was a flash nd a bang and the power supply blew. Luckily th
motherboard seems to be OK. I built the computer myself (it is th
10th one , I think) ,but this is the first time I built one fo
myself. I built or modified computers for family and friends, but
was building my ultimate computer, with the clear view side, coo
(literally) lights and as many fans as I could reasonably cram int
the case. Some of the fans were the lighted kind :) Hey, I should b
able to have a little bling bling in my computer if I want. Anyway,
learned about positive case pressure and stuff like that after th
blow up. What I need to know is how to determine which side of th
fand to use
Any help would be most appreciated
 
I have a couple of Logisys 120mm clear case fans. I am trying to
determine which side is "up", so to speak. On black case
fans there are arror markers to tell you which direction the fan
turns and the direction of the airflow. There is no morkings on
the clear fans. Am I just missing the obvious and I should just
connect them and feel which way the wind blows?
Click to expand...

Unless your fan blades are flat, the scoop of the fan blade
indicates airflow direction.
 
You could find the airflow direction this way: Turn off the computer.
Open the case. Don't install the fan in the case, but do connect it's
cable to one of the fan headers on your motherboard. Start the
computer. Feel which way the air is flowing.
 
DBMaster said:
I have a couple of Logisys 120mm clear case fans. I am trying to
determine which side is "up", so to speak. On black case
fans there are arror markers to tell you which direction the fan
turns and the direction of the airflow. There is no morkings on the
clear fans. Am I just missing the obvious and I should just connect
them and feel which way the wind blows?
Click to expand...

I must caution that I did
try that and the temp inside the computer got up to 159F before there
was a flash nd a bang and the power supply blew.
Click to expand...

I would caution you, that if by the mere introduction of a case fan, blowing
in or out, blows your PSU or raises the temp that high, there is something
wrong somewhere else. I can well think of some cases (cases) that could...
by some way out chance.... cause an anomaly like this, but I don't think
your a victim of any of that. What's your room temp like? Are you OC'n?
What's the intake vent / area look like? Does your PSU fan suck or blow? Do
you have an Intake fan(sucking outside air in) in the front? How is the CPU
cooled?

A F A your question about which way the fan should go that is blowing OUT
the back, is the same way the case fan The grill of most fans (the couple of
supports from the outer edge of the bracket to the center barrel) are
usually flush with the the bracket on the output side of the fan. It is
always customary for me to test the fan BEFORE its installation (Just
connecting the fan header) to make sure of the fans operation, thusly
figuring out which way the wind blows.

Luckily the
 
A F A your question about which way the fan should go that is blowing OUT
the back, is the same way the case fan The grill of most fans (the couple of
supports from the outer edge of the bracket to the center barrel) are
usually flush with the the bracket on the output side of the fan. It is
always customary for me to test the fan BEFORE its installation (Just
connecting the fan header) to make sure of the fans operation, thusly
figuring out which way the wind blows.
Click to expand...
Damn many words are missing from that paragraph, I don't know if I was
having a stroke or my editor went nutz.....sum it up\


The 'grill' of most fans (the couple of
supports from the outer edge of the bracket to the center barrel) are
usually flush with the the bracket on the output side of the fan.

Test the fan BEFORE its installation (Just
connecting the fan header) to make sure of the fans operation, thusly
figuring out which way the wind blows.
 
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