Review on 💨 ELUTENG 40mm USB Fan: Powerful 3-Speed Control Ventilator for VR, PS, Xbox, PC Cabinet Cooling by Meechie Camlin

In general, it works well. USB power delivery comes in handy for my project, and the 120mm fan definitely produces more CFM for less noise compared to the 80mm fan. Noise levels are very reasonable, although at medium or high levels (which is what you probably want), it's still very noticeable hiss. I don't think it will bother you, even at high frequencies, unless it's close to your ear (and even then it doesn't hurt, just annoying). However, I really don't think the CFM rating is correct. On the low level I hardly feel anything, and the mids and highs still seem well below the >50 rating they gave it. I don't have gauges, so I can't give exact numbers. I bet the max is somewhere under 40 (other fans put it at around 44?) and the low is somewhere around 30. Minute and noise level (and in hindsight I should have known better than to expect 56 from 1500rpm ), but if you trust the numbers, you'll probably be disappointed. This means it doesn't go through the heatsink I intended like I had hoped, but it still has enough airflow to remain reasonably efficient. to be better It's harder to get good results with a fan in that voltage range than it is with 12. I think that's probably pretty typical for that range. Of course, the presence of a USB port and a built-in speed controller is also very convenient. Most other 5V fans don't offer this convenience. (Some even come with a Molex connector. If you have a Molex power supply, you can also use a standard 12-volt fan.) You probably won't do better without upgrading to something significantly more powerful. (and gluttonous!) and loud, just don't let the numbers fool you. EDIT: I've found that the real problem is that I need more static pressure (especially for the application I'm using). inches) I couldn't find any measurements, but based on how little it pushes or pulls through the heatsink I can conclude it's pretty low. If you're just using it in an open area and nothing is slowing it down, it's probably pushing enough CFM to do its job well enough, but I think it requires something a lot more expensive (the Noctua brand seems like the best bet) for everything that requires pressure at all (they have a 5v fan which is probably 4 or 5 times his).