Noctua NF-A4x10 FLX, Premium Quiet Fan, 3-Pin (40x10mm, Brown)

Wow! I had to write this review! Based on the other reviews, I purchased this product (thanks to all reviewers!). I saw that another reviewer commented on the accessories this came with...that the accessories allowed a person to tackle any project. I thought "Well, that's nice. But I'm sure I'll just be able to hook this up without the need." In part, I thought this because I saw the fans in my Lorex DVR connected with a TWO pin end, and the Amazon picture displays a TWO pin end. Well, I was wrong...the unit ships with a THREE pin connector as the "default". So, I too was super happy with the additional accessories or else I would have been stuck! Here's more...My Lorex DVR has two fans. The fans in the Lorex DVR are "Fonsoning fsy40s12m." This company is in China. An email to them went unresponded to. An online research revealed only ONE seller that would sell these in lots of 50 each at a minimum...I only needed two! The fans in my Lorex DVR were LOUD already, but, when one started to go (after only about a year and four months), it became unbearably loud! Lorex support is horrible, as is their warranty (one year). I was told to either send in the DVR for a charged repair or replace the entire DVR. After conducting a ton of research, I discovered that the Lorex fans are 40mm (each side length) and 10mm deep...I received quite the education as someone who started out with zero know-how on this.So, I opened up the fan packaging...the cable had THREE pins for the connector...not TWO like what I needed and what the Amazon picture displayed. Okay, well this came with a 3 to 2 pin connector adapter...I thought "no problem." By the way, there is also an extension cable, in the event your fan is placed far from the power supply...very nice. Back to the 3 to 2 pin adapter...I put it in and assembled the entire DVR...a LOT of work (at least for plain old me). After all that work, the fan didn't even budge! Ouch!Then, I saw these other adapters included by Noctua. The instructions stated that, where the polarity is OPPOSITE what the connectors are set up as, then these special adapters can be used (you may be wondering what the heck I'm talking about, but to explain that would be tough here. Perhaps an easy way to explain it is if the wires on the Noctua are opposite what the power supply is in your unit...meaning, the red wire needs to connect to the black wire instead of red, etc.). I thought..."Oh no. Do I need to do this???!!! I can't just use an adapter?" Yes...I did. But, better this than not having a working fan. Unfortunately, you don't know if you have a reversed polarity problem until the fan is plugged in, so I recommend NOT reassembling the entire unit until you've tested the fan first, if possible and if it's safe. So, I went back to the drawing board and took the old fans out and cut their wires close to where the fans are located....because, with this setup, you need to use the pins of the ORIGINAL fans. You then need to insert the ends of the ORIGINAL fans (i.e., the cords with the pins connected to them...not the cord with the original FAN connected to it) into these special adapters with the ends of the NOCTUA fans...no wire stripping is necessary. You just push the buttons down on these special adapters with a pair of pliers and...voila...you have a makeshift fan connection using the NOCTUA fans with the ORIGINAL fans pins. I plugged them in and I had motion!!Now, one of the accessories comes with a special cable that will reduce the RPM's of the fans to make them quieter. I thought, "Hmmmm...the 'normal' RPM's on these things must be a bit loud for Noctua to include such a cable." NO!! They are super quiet! They are quieter than the original fans when I first received the Lorex DVR brand new!!! In fact, had I known about these Noctuas back then, I might have just installed them at that time!!! I need to stand next to the DVR to hear the fans (maybe five to ten feet or so).Oh, I almost forgot...the connections of the fans themselves. So, the old Lorex fans were screwed into the case of the DVR. There was a special nut in the back of the Lorex fans to accept the screw used. The nut wouldn't fit the Noctua since the nut was hexagonal, and the back of the Noctua is round. "Now what am I going to do?" I thought! Well, Noctua included an answer for this too!!!! There are four included rubbery inserts that you put through the case holes for your unit. In this case, I only needed two per fan. I couldn't use four because there were only two holes in the DVR at the bottom. So, I inserted these rubber pieces through the two bottom holes and used only the two bottom holes on the fan. I found that my needle-nosed pliers were very handy here because I didn't have much space and I really wanted a snug fit, so I used the pliers to pull the rubber pieces through. In fact, these rubber pieces are supposed to decrease sound even more, in addition to the rubber bumpers on them.The fans are super secure, super quiet, super efficient, they have accessories that REALLY helped my scenario. I couldn't be happier! And, I didn't have to spend hundreds or thousands of dollars on a repair or replacement of my DVR and lose any more time without it. And, they are quieter than the original fans...without the RPM reduction cable! When I looked, these fans are about twice the price of another fan I saw on Amazon, but, in my opinion, WELL worth it. If you have a DVR with fans that are going bad or just plain noisy, these Noctuas just my be your ticket.

I read a recent review by a person who said this was great for their Lorex DVR. So I took a chance and ordered it. Received today and in 3 minutes had it installed and working at a fraction of the sound of the other fan that had gone bad. And he commented on some of the cables about connecting properly and they had a perfect three to two adapter and within 5 seconds I was able to hook it up. I have two other Lorex DVRs and this fan is so quiet I'm going to order two more and replace them in those units even before they go bad.

Made my ReoLink NVR much quieter. I did notice that the metal lid of the NVR contributes a lot of sound if it touches or inhibits airflow from entering the unit. I cut out the metal the touches the fan or blocks airflow in front and the systems is barely audible. Now I don’t have to worry about the location of the NVR.

I replaced the fan in my Reolink NVR with this fan and it is so much quieter, especially using the low noise adapter. No over heating issues noted yet.

Good fan.

I bought this to replace the fan from a network switch, works perfectly!It was quieter than I expected to the point I didn’t even realize it was running which earned it an immediate 5 stars and a new customer.Definitely going to get noctua fans for my pc in the future

Great fans, typical Noctua quality. Ultra quiet.

I purchased the Noctua NF-A4x10 FLX, Premium Quiet Fan, 3-Pin (40x10mm, Brown)This was used for a replacement in my security systems DVR was too loud.Overview.The cooling fan is made with sturdy material and good craftsmanship, the bearings are tight and the fan moves freely. It comes with several adapters including one for three to two pin. It also has a adapter to allow you to wire it up you need to. It comes with screws to adapt the fan, and also some rubber adapters which I will cover later. Instructions and the box it comes in a pretty interesting and look like something high-tech. You would think there'd be something else greater in the box, but it's just a cooling fan. Or is it? It is three times the average fan cost. Meaning there are many on the Internet that are the third of this price. So you could technically by three of those over one of these so is it worth it?Pros: the fan comes with directions that are easy-to-read and installation is simple the screws supplied allow you to replace an existing fan and still have a proper fit. There are extensions as well as adapters to allow you to easily reach the power supply for your fan. It should be noted that this was put in a DVR, a longer extension may be needed depending on the case size.Cons:The screws that are included to mount the fan are poorly constructed and jagged, which concerned me that metal fragments could be dislodged from that screw if you were using this to go through a metal fan holder. All four screws included were all poorly constructed, and they threats themselves were not very smooth. The rubber adapters are made out of very poor material. They advise you not to overstretch them but meanwhile they are too thick to pass through the holes without tearing. And you cannot remove them without damaging them. Luckily I only needed to put away my mount for the cooling fan is. This material needs to be looked at and a better solution given. The rubber is a good idea, but the construction can be easily damaged.This Was a hard item to review, most cooling fans do not come with near the materials, or instructions that this comes with. On that alone I could give it five stars. But was unable to at this time because the included materials were not as of the same high quality the fan is. As noted the mounting hardware and rubber are not up to the standards of the fan itself and are poorly constructed. Being very included with the kit I have to include their quality and it doesn't affect the review. Had they not been included I would have given the fan itself five stars but the material included in the overall product I give four stars.The fan is quiet, my DVR fan was 10 dB higher in no ways than this fan. That may not seem like a lot when you have something sitting on your desk or near a place often accessed such as a desk having a noisy fan is not something people find acceptable. This fan is still not completely quiet, I expected something to be a little bit quieter than it was. 10 DB difference does make it to work does not interfere with a microphone that I have nearby. The previous fan made a background noise which affected the recording of my microphone. This new fan is quiet enough not to be picked up and I can appreciate that even though it's not completely quiet.So should you buy this fan? If you are buying this because you want a high-quality fan that is built extremely well and should last for years and yes. If you're buying it as a kid and you need all the other things included I still would say by but it is not exactly worth $15