AC Infinity, MULTIFAN S3 Quiet USB Cooling Fan

Update 3/2018: Expansion of the home network to include a home office resulted in another cooling fan for my crowded computer center (converted credenza, snug). The newest AC Infinity now has a variable speed switch, and costs less. Cabinet temps seldom exceed 5-7 degrees over the ambient room temp. The 120mm seems to be the best fan for the money. Original review: Small, but not so small that it can't move air. QUIET! Effective Once "installed" (more like placed in a cabinet), they are set-and-forget. I purchased 2 of these, being unsure att eh time how effective they would be in a renovated office credenza-become-computer center. Within the top half of this cabinet space, just under 3 cubic feet (9"h x 18"d x30" w) I have a satellite modem (runs very warm), 2 routers and a switch, and a desktop refurbished as a firewall. Before stuffing all these components into this space, they occupied the lower half of a bookcase that sat atop the credenza, and all were clearly producing heat. Therefore the notion that these AC Infinity fans (or similar) would be required inside the smaller credenza space. I started by placing one fan in the rear of the cabinet to push air (cool air from below) across the very warm sat modem and router out to the front of the open cabinet, and there I placed fan #2 to help pull warm air out and into the room. Both fans run exceptionally quiet, and I needed to check occasionally to reassure myself they were still spinning. There is a subtle movement of air as well, not a breeze; simply lick the back of your hand and hold it 2 feet away and you will notice the cooling effect on your skin (an old IT "procedure" for detecting failed equipment fans, always works if not sometimes salty). An indoor/outdoor thermometer served as a great way to measure temps outside the credenza and deep inside (placing the remote temp sensor near to the warmest component, the sat modem in my case). For 2 days the interior cabinet temps remained within 6-9 degrees of the room temp. So I removed fan # 2 (front of the cab opening), all without more than 1 degree increase resulting. Bottom line: small but moves air (don't expect a whirlwind or obvious breeze, it's pretty subtle), and very quiet. The rubber feet on all corners eliminate any vibration noises or humming, and also keeps the fan from moving anywhere. The alternative might be the AI-MPF80A2 dual 80mm fans (52cfm total) if space is an issue. If heat is more of an issue than what I described here, consider the AI-MPF120A2 dual 120mm fans, 104cfm total. Depending on how my single 120mm handles heat this coming summer, I may opt for this dual 120mm fan setup. As for the optional fan thermostat and speed control, I simply let my fans run off any available USB port and do their work. Recommended, keeping your gear cool (or not hot) at this price is great insurance.

I have a few of the earlier model of this fan, in 80mm, 120mm, and 140mm. There are some differences between the older model, and the newer model of these fans. - This fan was already assembled. The earlier model, I had to screw the fan guards and feet on. - The older model was only on/off, this new model has the option for Low, Medium, High, and Off. - The older model included a USB-to-AC power adapter. This new model lacks the adapter. So far, this fan is nice, I like the variable speed settings. I like it was ready to go out of the box. I used a USB-to-AC power adapter with this new fan, since the switched item I have it cooling, only has a switched power plug, nothing USB switched. When this 120mm fan was on High speed, it seemed a bit louder than my old model 120mm, but I didn't compare the two too much. I bought this to replace an earlier model of the 140mm AC Infinity fan. I found the 140mm fan to be noticeably louder than the 120mm fan, the older models I own. After that, I decided that when I needed more fans, or needed to replace a fan, I'd buy 120mm, no more 140mm. Well, a 140mm fan began to get noisier and noisier lately, so due to the fan increasing in noise lately, I decided to replace it with this 120mm fan. I was happy with the older model of these fans, though I preferred the 120mm, to the 80mm and 140mm. 120mm had a nice balance for cooling and low noise. So far, I am happy with this newer model fan. The variable speed switch is nice, shame they took out the USB-to-AC power adapter, but that's OK, I still have some from the older model fans, and it's an easy enough item to find and purchase separate. These fans do their job well, cooling the electronics I want them to cool. All of them I have in use, are pulling air through the electronics, though, not pushing it.

I purchased one and it worked so well I picked up a few more. They are quiet and have many uses. I initially used them to cool external hard drives when backing up the computer. However I found they are quite useful for cooling down cups of tea or bowls of soup when the are too hot. I generally just run them on medium where they are whisper quiet.

I have order from AC. Before quality product and quiet.

I would have given these fans 5 stars but, if you are like me, you tend to skip the 5 star reviews to try to find the "real" reviews. This is one. I got these fans yesterday to cool some external SSD's and a Thunderbolt hub so I am using them purely on an external basis. Here are my comments: 1. Air moved - these fans (bought 2) move plenty of air. Can you use them to keep you cool on the porch? No. But will they move enough air to keep your PC/Mac and peripherals cool? Yep. 2. Noise level - on low (which will probably move enough air for many applications) they are VERY quiet. I have 2 of them on high and I can hear them (they are on top of my sidetable and are not inside a case of any sort) but they are definitely not annoying. 3. USB power - that is GREAT! I have the fans daisy chained and am using 1 USB power adapter. Perfect. The fans ship with a fairly long (1.5 to 2.0 meters probably - I didn't measure) USB cable so if you need to space them out for your application you should be in good shape. That's a little much for my application but I prefer too much to too little. 4. Ease of connection/setup - couldn't have been easier. These are working great for me so I am giving them 5 stars under the table so maybe more people will read a real review.

This fan is great! It moves a lot of air and it is so quiet! I use them as cooling fans for my aquariums because they are luw DC voltage and they are extremely quiet!

OK, I was recently asked again by Amazon to join their exclusive Vine program to become a "professional" reviewer of products. I didn't join as although retired, I find better things to do everyday besides review the hundreds of products I have purchased over the years. Now, about this AC infinity Multifan S3 - I saw this on a list of many products I have purchased and they work so well I was compelled to put in an updated review after using one of them for about 8 years. I have a Summer home in NH and my IP router in the garage. Seasonally, one of these fans has been sitting on the shelf about 4 inches from my router to keep the router cool during Summer months. I don't shut the router down due to security cameras in use all year. Well, this mighty little fan has run non-stop, 24/7, 365 days per year for about 8 years....and still going! I mean, what else can I say but the name Infinity is 100% true in my experience. One of the best and longest lasting products I have ever purchased! By the way, back then it was sold in a 2-pack, so if the 1st fan ever fails, I have a backup. Stop reading this review and go buy these fans! You'll stay cool like FriGato

Bought this to cool my Xfinity router which runs hot. Fan is super quiet. Works great. Nice long cord.

Note: Product purchased directly from seller AC Affinity and fulfilled by Amazon. I use this to improve the air circulation on my Xbox One, which is housed in a narrow TV cabinet. Even though the cabinet is not fully closed, the external of the Xbox can get very hot, especially during a long session. I placed this fan directly on over the Xbox's top vents, blowing away from the xbox. The build quality is solid. You can shake it about, try to bend or squeeze it, there is no rattling or even creaking noise. Around the frame, all surfaces that you can touch, it is all smooth, no hint of any sharp edges. When the fan is running it is very quiet. There is a mechanical switch built into the USB cable. This switch has 4 positions; OFF, speed 1, 2 and 3. At speed 1, you wont even know it is running. Speed 2, in a room without any other sound you can almost hear it, but it is still quieter than my external Western Digital hard drive. Speed 3, well, you can definitely hear it. Not that the motor is noisy, just the wind noise it generated, and if you have the TV speaker on, it will drown out the noise from the fan. The OFF position is very useful, because I connected to the XBox usb port, and the port is always powered, even when Xbox is in standby/sleep mode. With the OFF position I can switch off the fan when I not using the Xbox. This is so effective, speed 1 is enough to keep the Xbox cool. The fan comes with 4 rubber feet attached, it does a very good job of keeping the fan on top of the xbox. At £15, this us not the cheapest 120mm fan on Amazon, but I am convinced this is worth its price tag. It is certainly has done what I needed it to do and quality is great. Only question is, how long will it last, time will tell. I would highly recommend this fan to anyone looking to improve air circulation for AV devices.

Excellent performance just love it build quality excellent keeps my PS4 and Xbox one x in ample temperature

This is my 2nd time getting from AC Infiniity. My first, two fans affixed to my home server cabinet, have been running 24/7 for the last 4 years. They are still quiet and blowing strongly. That says a lot.

Lo compré para mantener frio un MINI-PC cuando lo tengo trabajando a máximo rendimiento. El ventilador no se escucha nada (tras 3 meses de uso) y mantiene fria la dependencia donde se aloja la RAM y los SSD, al que está destinado el ventilador.

良いです 強でも音も静か 7年近くノーメンテで耐久性も問題なし 当たり前ですが、定期的に掃除をしないとホコリが取りづらいぐらいですかね