Overclock.net banner

1 - 14 of 14 Posts

·
Premium Member
Joined
·
7,862 Posts
Discussion Starter #1
I'm on the Noctua site looking at some fans...they claim these specs

Size 120x120x25 mm
Bearing SSO-Bearing
Blade Geometry Straight-Blade-Design
Rotational Speed (+/- 10%) 1200 RPM
Rotational Speed with U.L.N.A. 600 RPM
Airflow 81 m³/h
Airflow with U.L.N.A. 41 m³/h
Acoustical Noise 17 dB(A)
Acoustical Noise with U.L.N.A. < 6* dB(A)

So I'm looking at 17-23dba with how many CFM? I have no clue how to convert that...the relation works out to

1 meter = 3.2808399 feet
1h = 60minute..duhh...

So would I multiply 40, or 80 by 3.2808399 and divide by 60? That gives me like 4cfm.. haha
__________________
 

·
Premium Member
Joined
·
45,674 Posts
Does area cubed come to mind
 

·
Premium Member
Joined
·
45,674 Posts

·
Premium Member
Joined
·
7,862 Posts
Discussion Starter #6
Its cubed though, not square...
ah thanks tank, so its onyl like 50cfm :<
 

·
Premium Member
Joined
·
45,674 Posts

·
Power Squid
Joined
·
9,609 Posts
Quote:

Originally Posted by Kopi View Post
Airflow 81 m³/h
I hope I worked it out right;

81 x (3.2808399 x 3.2808399 x 3.2808399) / 60 = Airflow 47.67CFM
 
  • Rep+
Reactions: Kopi

·
Premium Member
Joined
·
7,862 Posts
Discussion Starter #10
Yep, you did it by hand but a machine just told me the same thing...i was really hoping these fans would be near 80 though
 

·
Banned
Joined
·
715 Posts
Quote:

Originally Posted by t4ct1c47 View Post
I hope I worked it out right;

81 x (3.2808399 x 3.2808399 x 3.2808399) / 60 = Airflow 47.67CFM
yep thats how you do it. its around 50cfm
 

·
Registered
Joined
·
1,707 Posts
Quote:

Originally Posted by Sreenath View Post
you multiplied by 60 not divided.
I realized that. Was doing it in my head before I looked at the site.
 
1 - 14 of 14 Posts
Top