Seasonic MagFlow 120mm Cooling Fan Review

Utilizing my newest toy, a Long Win LW-9266 Fan PQ performance measurement apparatus, I look at Seasonic’s high-end MagFlow fan which promises high performance featuring a daisy chain design which makes a breeze the installation of multiple fans. 

Read the updated review on this product here: Seasonic Magflow 120mm Cooling Fan Review – ReCheck!

Fan testing is tough if you don’t have the proper equipment, which is specialized and super-expensive. After years of struggle, I managed to get my hands on a Long Win LW-9266 Fan PQ Performance Measurement Apparatus. Along with the rest of my equipment, a hemi-anechoic chamber with below 6 dBA noise floor and a top-notch sound analyzer and mic, fan testing will be a pleasant experience for you and me!


Cybenetics Coolers Database


The Seasonic MagFlow 120mm starts from €29 and goes up to €83 for a 3-pack bundle. This is not an affordable fan, with a similar price to the Phanteks T30-120, which I will evaluate in a future review. Besides high build quality and the fluid dynamic bearing, the 120mm MagFlow features a magnetic connection system that allows the easy connection of multiple fans without the need for cabling.

The power cable attaches to the fan magnetically, so it is safe to say that these fans are fully modular. Thanks to a pretty strong magnet, the connectors easily snap in place.

Technical Specifications:
  • Model Name: Seasonic MagFlow 1225 PWM
  • Model Number: SF-12025MF-P
  • Nominal Input Voltage: 12 VDC
  • Rated Input Current: 0.10 A
  • Startup Current: 0.18 A (max.)
  • Rotational Speed: 600 – 2000±10% RPM
  • Acoustical Noise: 9.9 – 33.78 dBA
  • Air Pressure: 2.61 mm-H20 (max.)
  • MTBF: 100,000 hours
  • Bearing Type: Fluid Dynamic Bearing
  • Dimensions (W x H x D): 120.4 mm x 124.2 mm x 26.6 mm (Fan including magnet and rubber pads)
  • Weight: 212.7g
  • Warranty: 3 years
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7 thoughts on “Seasonic MagFlow 120mm Cooling Fan Review

  1. Would you consider testing servers as well? There is a huge difference between advertised vs real performance regarding acoustic noise. Just one exemple, Dell PowerEdge T350: advertised between 31 – 40 dBA (depending on configuration, entry, typical, feature rich) vs. real 48-50 dBA at only 65% PWM 3480 RPM (mesured with SoundMeter app on Samsung Galaxy S10e). This server cooling design relies on only one 92x92x38mm Delta AFC0912DE fan with great performance (160CFM @ 6000 RPM), but with great noise too, 63 dBA…

  2. One minor issue. The max power chart seems backwards. It says higher is better. With power consumption, lower is better.

    The data is great though.

    1. Fixed that in the new review, thank you! Noticed it too before I post it (Phanteks review). So many graphs, so much data, so little time 🙁

  3. Would you consider adding noise-normalized charts? I think it would be really helpful metric to compare fans with. That way fans can’t just brute-force their way to the top of a chart.

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