This makes the NF-S12A remarkably quiet even at very close distance. The latest version of Noctua’s advanced Smooth Commutation Drive system ensures superb running smoothness by eliminating torque variations and switching noises. Integrated Anti-Vibration Pads made from extra-soft silicone minimise the transmission of minute vibrations while maintaining full compatibility with all standard screws and other mounting systems. This flow separation phenomenon known as stall leads to undesired turbulence, reduced efficiency and translates into a dent in the fan’s performance curve. The lower the speed and the higher the counter-pressure, the higher the risk of the air particles becoming detached from the blade surface. In these situations when the fan is building up high pressure but less air is moving through, the speed of the air particles flowing alongside the suction side of the fan blades gradually decreases towards the trailing edge. Noctua’s AAO (Advanced Acoustic Optimisation) frames feature integrated anti-vibration pads as well as Noctua’s proprietary Stepped Inlet Design and Inner Surface Microstructures, both of which further refine the fan’s performance/noise efficiency. Noctua’s Advanced Acoustic Optimisation Frame Its superb running smoothness, SSO2-Bearings and Noctua’s trusted premium quality make it an elite choice for quiet case cooling. The ULN version provides super-slow 800 / 600rpm speed settings for ultra-low-noise applications and highly noise sensitive users who demand near-silent operation. The NF-S12A improves the airflow/noise efficiency of its renowned predecessor by up to 8%. Two speed settings for maximum quietnessįeaturing a further refined blade design with Anti-Stall Knobs that works in tandem with the new AAO or Advanced Acoustic Optimisation frame.
changing thermal paste got me -10c, a cooling stand got me -5c and blowing a fan at the laptop got me an other -10cĪll together it adds up on a laptop. Having your fan off when the CPU is cold will not harm it and then having it go right to 100% isn't good for the life of a new fan but it seems your fan is already dying anyway so this is to increase the life of a dying part and is ok drop it 5% from default till the noise goes away but i have a striking suspicion it won't go away till 0% You can lower it by 5% until the noise starts (N) then crank it back up 5% and go from 0% on cold to N+5% if you don't want to go from 0-100%Īlso you can try to see if lower than the default 30% on cold will make the noise go away too. even curve it from 105-150% if your hardware supports it for the highest temps but the only way to get rid of the noise aside from changing the fan or heatsink assembly (if the fans are soldered to the heatsink you'll need to change the entire assembly) is going from 0-100% on a custom curve and just stop the fans from running in the problematic range you can do a custom fan curve to turn the fan off at low temps and make it go straight to 100% for high temps. The fan is starting to go bad or there is something stuck in it that all the blades are hitting as it spins, the fact that its only happening on low speed and not high speed makes me think maybe its a baring.