- Joined
- Sep 25, 2015
I have a question here for the larger group...
Yesterday I installed my brand-spanking new Corsair ML140 Pro (Red LED) Maglev fans. Wonderful fans...very impressed.
When I put a given fan in the front of the case as intake, it makes a humming sound at PWM signals larger than 70%.
When I put THE SAME fan on my radiator or as an exhaust, it is absolutely silent at all PWM signals through 100% (except for the gentle woosh of moving air.)
I found that if I run the 2 ML140 intake fans at 70%, and the 2 ML140 radiator fans (as exhaust) at 80% or higher, the front fans are completely silent at 70%, and start to hum around 75%. If I decrease the speed of the radiator fans to 50%, the intake fans start humming at 50%.
So - do I have a case vibration?
Do the fans not like driving into positive pressure?
Consequently, the hum is the same frequency as what the Noctua iPPC-2000 PWM fans would do...except those fans would always hum...regardless of if they were in the front, on the rad, or as exhaust.
Thanks!
Yesterday I installed my brand-spanking new Corsair ML140 Pro (Red LED) Maglev fans. Wonderful fans...very impressed.
When I put a given fan in the front of the case as intake, it makes a humming sound at PWM signals larger than 70%.
When I put THE SAME fan on my radiator or as an exhaust, it is absolutely silent at all PWM signals through 100% (except for the gentle woosh of moving air.)
I found that if I run the 2 ML140 intake fans at 70%, and the 2 ML140 radiator fans (as exhaust) at 80% or higher, the front fans are completely silent at 70%, and start to hum around 75%. If I decrease the speed of the radiator fans to 50%, the intake fans start humming at 50%.
So - do I have a case vibration?
Do the fans not like driving into positive pressure?
Consequently, the hum is the same frequency as what the Noctua iPPC-2000 PWM fans would do...except those fans would always hum...regardless of if they were in the front, on the rad, or as exhaust.
Thanks!