Scythe Kaze Flex II PWM, 120mm, Premium Quiet/Silent PC Computer Case Fan, Quiet Model, Low-Noise Optimized, 4-Pin, Deluxe Black Colour, Single Pack

These have great flow characteristics on low fin heatsinks, like those found from scythe, and cases. In both cases, they are extremely quiet, more so than the Noctua Redux that I replaced, where at 1200rpm you could hear the buffeting air with the noctua. Not that it was a bad sound mind you. It is much better sound than the noctua is what I am saying though. May system is running cooler with these, but that is my case supports 3 120mm or 2 140mm. So getting these allowed me to add one more fan verse the 2 140. This offers better pressure characteristics and encourages flow.

Scythe has been my Go-To case fan for a while. I like slow & quiet. That being said, these are their slowest fan, and there is a limit to under-volting them. Specs say 300-1200 rpm, but they don’t start up reliably if running under 600. Still very happy with them.

This fan matches the one attached to my heat sink.

Ive bought 5 fans, no regrets so far :D

Value

I use this as an exhaust fan and its super quiet! Spins at 1200 rpm max and doesnt make a peep!

Ive had these for a couple of months now. Out of curiosity, I set them to 100% and all I could hear was wooshing from the air.

Silent and efficient. These puppies are quiet, even at max load! You wont hear much bearing noise, only the wind turbulence.

I dont remember giving anything a 5 stars review, but this fan definitely is worthy. I built a Core i7 11th gen budget PC, which is known to run very hot. With a stock case fan, the CPU was idling low 50s degrees C, and just light to moderate load caused the temp to go up to 70-80 degrees C. I saw a comparison review on Youtube where the author gave this fan a good review; in fact the author recommended this one over the more expensive Noctua and Artic fans. Considering the price, I decided to give it a shot. So I replaced the stock case fan with one of these and added another one to the front of the computer case. The result: CPU now idles mid to high 30s, and at 100% load, barely reaches 70 degrees C. My GPU also dropped around 10 degrees as well. Im really happy with these results because Im not a heavy gamer, so most of the time, the CPU will be around 40-50 degrees. The noise level is totally acceptable; I dont have metrics to give, but just judging from the ambient noise, this fan is very quiet. Considering the price and performance, I would go back to this fan any time I build a PC. Just remember the general rule to channel the air in one direction for all the fans inside the case; in my case, all the fans work pull air from the front and push out to the back of the PC (dont forget the orientation of the CPU fan as well, if applicable). Highly recommend this fan.

They gave me the wrong screws other than that i love the fans auirt and keeps temps low