Pros: This fan can definitely move much more air than my previous fan that came with the chassis. It is not as loud as I thought it would be given the ambient noise in my room.

Cons: The cable is too short to reach the fan connector on the motherboard. Nothing serious but needs an extension. My chassis comes with some LED connectors, so when I replace the original fan with this, there is not connection to the LED. Not a major issue for me. Lights dun matter to me anyways.

Overall Review: It's a a good fan overall. The short cable is something to think about if this fan is to be mounted farther from the motherboard.

Pros: -Moves a lot of air even at a fraction of full power. -Comes with power adaper and nice mounting hardware. -Labeled with rotation direction and airflow direction (a minor point, but still kind of nice not to have to think about it).

Cons: Fans are a necessary evil in a high end machine. Complete silence is virtually impossible, especially with ball fans.

Overall Review: The key to any quiet air cooling system is a fan controller. Your fans will be loud if they run on 12 volts. Period. Large fans at low RPM will acomplish the same cooling as small fans at high RPM but with a lot less noise, so choose 12CM fans whenever you can. Also the placement of the fan contribues a lot to how loud it is. If the intake side of the fan is obstructed it will be a lot louder. The pre-cut air holes in most cases don't allow the fan to work at it's full potential so if you really want it to be quiet and efficient you'll have to take a saw to your case.

Pros: Fast shipping. Easy to install, sure it'll work for while, no problems. had to buy this to replace a faulty 120mm that came with the case.

Cons: Really Noisy. but can fall asleep pretty easily to it. LOL

Overall Review: Was able to just go to my MB settings and change the setting to SILENT for the Q-FAN technology from ASUS. works perfectly.

Pros: This fan is reliable and moves a lot of air.

Cons: Sounds like a jet engine at take off. I have it mounted at the front of an Antec 300 case and it drowns out every other noise my system makes.

Overall Review: Good air flow, reliable, but very very loud.

Pros: Great fans, nice coming with the converter to molex.

Cons: None

Pros: First of all: I chose these fans because I thought they had a good shot at being reliable over the long term. The build I'm making is going in a datacenter so I don't care how loud it is. That said, I was very surprised by how quiet these fans turned out to be. The stock cooler on the AMD Opteron 1222 I bought for the same project was easily louder than these fans (especially when it revved up due to a high ambient temp). The RPMs on these fans are as-advertised when powered by the 3-pin fan headers on my ASUS M2N-LR.

Cons: The wires are way too short! If you are going to be using this in the front of a mid-tower case and care about powering the front fan from your motherboard (so you can monitor fan speed in software and be notified if it stops running or slows down) then save yourself some time and just include a 3-wire extension cable with your NewEgg order. This is what I did and it worked out perfectly.

Overall Review: If you intend to power this fan using a motherboard fan header you might want to check the mobo manual first to make sure it can supply enough juice to run the fan at top speed. I did this before buying anything by downloading the mobo manual from the ASUS site.

Pros: Great performance/price ratio. Blows a great amount of air.

Cons: Slightly loud, but by no means unbearable. I am running three of them in addition to a 250mm side fan as well and the whole setup is not too loud for me. If you think they might, get a fan controller. Wish it had LED's, but then I could have got the A2018 model.

Overall Review: Some may want to put it on a fan controller if using more than one.

Pros: Solid construction

Cons: strange nuts and bolts, didn't include normal fan screws

Overall Review: Made a little noise that could be corrected by changing bolt tightness. Served quietly for three years and three months before begin to make a noise that prompted me to replace it.