Pros: PWM. At high load on my q6600 (orthos running on 4 procs @ 3Ghz on 1.30 V) it only spins up to about 1300 rpm (speedfan). At idle, stays around 740rpm. Seems to work as it should. Very quiet at either 750 or 1300 rpm (my psu is much louder at either speed).

Cons: None performance-wise.

Overall Review: The packaging says 37 cfm. The arctic cooling website says 55 cfm. Which to believe? Your average enthusiast isn't going to have a way to measure this easily. Inconsistent specs make me wary.

Pros: This fan is very quiet and moves a lot more air than the stock fans that came with the case. The daisy chaining of PWM fans is great as you can control all of your fans at once.

Cons: Fan does not work on anything but a 4 pin PWM connector. This fan has an adapter that is 3 pin, but when plugged to ANY of the slots on my A1 mobo it doesn't work. It will only work when daisy chained to the one 4 pin CPU fan port on my mobo.

Overall Review: I have all Arctic Cooling Fans in my setup and they work great. I only trust Fluid Dynamic Bearings as they are the quietest and the most efficient. I have 2 120's sitting atop my Cooler Master CPU heatsink, and they keep my temps about 30*C under load.

Pros: Replaced some Cooler master fans with these, they move more air at lower rpms and cool better. They are drop dead quiet, lowered my idle temps all around by 3c to 4c and are doing it at 300 rpms slower than the cooler masters. Like the PWM feature and it makes for a very quiet rig.

Cons: When set to max, you can hear them but nothing that is too loud. Box says 37 cfm, checked AC web and it matches newegg specs. I would say they are closer to 60cfm at 1500 rpms and about 40cfm at 900 rpms.

Overall Review: Would buy again.

Pros: PWM means that the fan only runs as fast as it needs to, so everything stays nice and quiet. The chaining of fans is great, allows for a constant airflow when paired at the front and back of a case.

Cons: Could not get the provided screws in. They have to self-tap the plastic. I ended up stripping my screwdriver and more than a few screws. The solution: really tight zip-ties.

Pros: PWR managment works as low as 200RPM, max around 1500RPM, Love the fact you can connect to together and use PWR managment to control both fans like they are one.

Cons: None

Overall Review: Comes with Artic cooling stickers!

Pros: PWM makes this fan very very quiet...used this as front fan... I can only here it when my ear is next to it...front fans need to be quieter because their location makes them easily heard... 6 year warranty and FDB bearing

Cons: Dog pointed screws (like the ones supplied with the case/fans)made install easier/possible (screws from AC are not dog pointed)

Overall Review: I used this with and AC cpu cooler both freezer 7 and 64 in systems... and being a eng/tech have replaced the fans in PSUs supplied with cases (without warranty)with AC pwm fans to yield very quiet PSUs.

Pros: This is actually my second purchase of one of these 120mm fans (I also have 2 of the 80mm and 4 of the 92mm PWM versions in this and 2 other builds). I bought the 120mm's to replace the Antec Tri-cool fans that come with the Antec Solo cases as they require you to monitor the case/CPU temperatures and adjust the speed accordingly (either that or leave them at high, thus defeating the purpose of having the 3 speeds). They run very quietly and move sufficient air to cool the case along with the 2 92mm fans at the front of the case. Most of the time they are completely inaudible. Even when they spin up when I'm using all 4 cores (8 threads) to the max doing computer renderings they are barely audible in this case.

Cons: None that I can think of.

Overall Review: The first 120mm and 2 92mm fans that I put in a build back in 09/2007 are still working just fine. My current system: Antec Solo Black case Intel Core i7 920 ASRock X58 Extreme LGA 1366 MoBo GIGABYTE GeForce 9600 GT 1GB Silent Cell Vista Home Premium 64-bit SAMSUNG Black 22X DVD Burner ARCTIC COOLING AF12025 PWM 120mm Case Fan 2-ARCTIC COOLING AF9225 PWM 92mm Case Fans 2-WD Caviar Black 500GB 7200 RPM 1-WD Caviar Black 160GB 7200 RPM

Pros: very quiet. Easy install and multiple power hookup options. I went strait to the motherboard to keep things simple, and to be able to control the speed.

Cons: none

Overall Review: comes with a case sticker but i already have one from my cpu cooler. I am getting another one of these to replace my intake fan so my computer is much quieter.