Noctua NF-A20 PWM, Premium Quiet Fan, 4-Pin (200x30mm, Brown)

I had never heard of Noctua until recently and pretty much thought of computer fans as just generic fans. My ignorance was suddenly exposed to me and it seems that Noctua was founded on the principle of "we are going to be Rolls Royce of computer fans". I am looking to build a Corsi Rosenthal box for air filtration. I was going to get a box fan until I read all the reviews saying how loud they are. That quickly took me to the superiority (at the noise level at least) of using computer fans instead, and every review I saw on YouTube either used Noctua fans, or said that the box under review was really good and/or quiet but obviously wasn't as good or quiet as if they had used Noctua fans. With so many references to this company, I started reading up about the company and looking up their fan models.I eventually bought two of their NF-A20 fans. Everything about them is quality - from the packaging, documentation, performance, supplies that come in the box with the fans. Noctua don't stint in trying to provide the customer with the best experience and best fans possible. Are Noctua fans expensive - yes, but you certainly get the quality you pay for. The level of performance engineering in the fan design and attention to detail to prevent vibration and noise while maintaining quality performance is evident in every aspect of their product.I have no yet tested the air flow of the fans but I'll be highly surprised if they don't meet (if not exceed) the documented performance advertised. I don't have a sound meter but these fans are SUPER quiet! I cannot believe that anyone could accuse them of disturbing sleep for example. On the contrary, if you can't actually see the fans turning and aren't in the direct line of the airflow, you can easily wonder if they are even on and working as any ambient noise will totally hide the noise of the fans themselves.HIGHLY RECOMMENDED!

Pros:-Silent due to pushing good air at low RPMs-comes with an extension and even a low noise adapter to force its max RPM to be lower if needed-Price isn't bad considering the qualityCons:-Very thick which can cause an issue in some casesAwesome quality fan that I have no issues recommending to people if that are in the market for a good quality low noise fan.Side note for fitting in the Cooler Master h500 case:It fits in the top if you remove the rubber bits on the corner (other wise they'll fold due to pushing), then line it up so when you shove it in then it'll basically be where the holes are lol Yes I said shove it in. You have to force it in, but no worries it won't break the case nor the fan. Secure it with screws in the fan box instead of the silicone options. The Case wasn't made to accommodate a 200mm of this thickness, but it will still work. Just make sure you have the fan oriented the right direction ahead of time so you can have enough room to plug it in, though it does come with a nice extension that I did use for tidy cabling purposes.I did not try the front fan section since there are no mounting standards for 200mm fans. Since the top was a very tight squeeze, there was obviously no planning around making Noctua's 200mm fans fit.

I bought this as a replacement for the stock fan in my CM Trooper since it started making a horrible grinding noise which kept getting worse over the last few months.I was hesitant to buy this particular fan due to many reviews stating this fan being oversized and not fitting, plus my case wasn't listed on the official compatibility table either.But there are not a lot of good options for 200mm fans and most had some kind of flaw.The Noctua's are touted as the best on the market and the only flaw seemed to be its size. So I went ahead and chanced it, with the plan to return it for 2 smaller fans if it didn't fit.To my surprise, it fit great! The screw holes were only slightly off and I was able to install with no issues.The fan comes with several different mounting options - standard mounting screws and also 2 styles of anti-vibration mounts. I went with the anti-vibration mounts which made installation even easier since you just pull the flexible strands thru the holes, no tools required. It took longer to figure out how to take my case apart to get to the top fan than actually installing it.Turned on the PC and no more grinding sound! I'm about a week in, so will be interesting to see how things are a month/year down the road, but so far this thing is quiet and provides great airflow. Definitely lives up to its reputation.