Pros: Well i was skeptical at first. I own Corsiar 550D and I needed more air due to X fire set up. I replaced teh stock 120 Corsair fan that came with the case with these. Big difference! I have a fan controller so when they are turned down you cannot hear them at all. But turn them up and so much air and not that loud. Although at high speed they do make noise

Cons: Price

Overall Review: Quality fans and next to the stack Corsair fans you can tell why

Pros: lowered temps. good static pressure for water cooling, pwm, all my new motherboard have pwm connections colorful inserts

Cons: noda

Overall Review: I replaced 2 out of the six COUGAR CF-V12HP fans on my radiator with these fans in push pull configuration. temps dropped 5% now these fans are slightly louder but they push a lot more air. I fined the silent cougar fans have to work harder making them about the same in sound yet these corsair fans push more giving cooler temps. I plan on replacing all the fans on the radiator with these. I don't over clock usually. I tried a little push to 4.5ghz and was 5deg less with just 2 of these fans installed cant wait to replace all the fans with these

Pros: Trusted brand, solid construction I will definitely use these in future builds! PWM if you need it, they do make a non-PWM version Comparable to Noctua for less cost Moves a lot of air, Good static pressure I actually replaced a Noctua NF-P12 (CPU Fan) and Scythe S Flex SFF21F ( Exhaust Fan) and saw temps drop by 3 degrees. Runs quiet if kept at or below 1500RPM At full speed noise from CPU fan was not very loud Mounts are very solid and did not cause any vibration noise Simple black fan, colored rings are optional if you must add some bling. Was able to easily mount to my existing Noctua CPU cooler

Cons: Can be noisy for some Cable was adequate for me, but in a large case it could be a bit short.

Overall Review: Not silent, but these are not meant to be silent I didn't find the colored rings added any value for me, but the fan is really worth the cost and it doesn't light up which is a HUGE plus for me. If you are considering these verse the silent version, go with these and just turn them down to 1400RPM, that way you can reserve that extra power if you need it for a more extreme situation like heavy gaming or a hot day.

Pros: Corsair has become a name to be reckoned with in recent years. Just about everything they put out, with a few exceptions has had rave reviews throughout the PC industry and its with good reason. Their quality control, research and development, costumer interaction (they actually read the forums and revise product lines by taking in to consideration comments and suggestions made by their core customer base), and product value to performance ratio are all up at the top of the charts and can hold their own against any company out there today. It seems the more I personally deal with their products, like this one, in a hands on setting the more I can say nothing but good things about them. Now granted companies with have stumbles or hiccups every once in a while but these fans are not one of them. If you know what you're getting in to and know how to properly use these (its very simple) you will be very pleased with these fans on a liquid cooling radiator, on a CPU cooler, or even as an intake in some instances. The high static pressure rating at full speed of over 3mm/h2o is a like a tornado set to blow down anything in its path. That being said it does come with a bit of noise at top speed, but any performance fan does but it's actually a very good noise to air ratio when you account for the static pressure as well (35db for one fan.) Keep in mind that this will increase as more than one fan is added but for a peak db of 35 for one fan, you probably won't hear it over your video cards fan when things get hot. Also this being a PWM fan and not a standard 3pin or molex fan, it will be controlled via your motherboard when properly setup and probably won't ever reach too speed unless you have poor ventilation or you're benchmarking for an extended period of time. I personally love to use PWM fans on my self contained liquid cooling units (like the Corsair H100, H80, and so on) because it allows for a fairly user friendly approach without the need for a fan cooler or a program to keep things at desired speeds when things got hot or cool down. It will pretty much do all of the work for you with any modern motherboard that worth buying. At 0.25 Amps this fan can be used in conjunction with a fan controller and an adapter but that seems like a waste to me personally when you could buy a non-PWM fan if you're going to use a fan controller with your setup. These fans are so easy to use that I can't help but recommend them to anyone looking for top notch performance that can also be quiet when you're not gaming or doing something CPU / GPU intensive. Once properly installed a PWM fan doesn't require a fan controller and essentially can be controlled "hands free" via the motherboards internal sensors to keep your system running at optimal sound levels based on the temperature readings.

Cons: These are PWM controlled so you'll have to attach an adapter to use with a molex or 3 pin connector, but if that's what you need you should be buying the standard (non-PWM) model fans from Corsair, or another company instead. That being said at full speed these can get somewhat loud if multiples are used which wouldn't suit certain enthusiast who care more about silence then all out performance. Obviously "loud" is subjective and if the system will be tucked away under a desk or in enclosed area this would help to lower the perceived level of sound emitting from your system. One thing to keep in mind is that as a PWM model these fans won't run at full speed very often if at all as they will increase their speed as temperature readings rise thus effectively lowering the overall system temps with increased speed and airflow which would then end with the fans decreasing their speed and accompanying sound levels as this reading lowers. The effectiveness of this will obviously vary based on the airflow, ambient temperature, case design & placement of the system. Also the claimed db rate will climb substantially as you increase the number of fans used in any given system but this is the same for every fan obviously not something that pertains to the Corsair fans. With all of that in mind I find these to be the perfect balance between all out guns blazing performance (for a CPU cooling situation) and sound levels. I personally don't think they're loud at all as the noise emitted seems to be at a frequency that isn't too high or too low and doesn't squeal or bother me, most of the noise I hear is the airflow itself which no fan can prevent from happening at the CFM ratings these are pushing at full power.

Overall Review: If you need a PWM for a Liquid Cooling System Radiator, wether its "push", "pull" or "push/pull" this is a quality unit with a very high pressure rating that it more than lives up to. Look no further and buy these fans. (And if you want a better "deal" purchase them in these packs of two rather than individually. If you're overly sensitive and/or the type of person who runs "Gentle Typhoons" at 1400 RPM and still puts them on a fan controller, and doesn't need all out performance or a high performance to sound ratio, these might not be for you. For the rest of us though these are the perfect balance and a phenomenal purchase. The price may seem steep but they come with a solid warranty, and with the bearings used I honestly think they will last a long time, thus saving you money in the end. You really do get what you pay for and with Corsair you're paying for well researched and well designed products that are of the highest quality.

Pros: Nothing overly significant that's not already noted on the Details tab. * The fans are native PWM controlled, so with an appropriately spec'd motherboard, you'll get accurate fan control and reporting. * The rubber mounting corners will definitely eliminate the fan as being the cause of any vibration or resonance heard in the case. * The power cable is 12" which allows for most longer cable runs to the motherboard headers. (Although you'll definitely want to note the distance between your motherboard header and the fan placement, especially if the headers are at the bottom of the board and your fans will be at the top of the case.)

Cons: Nothing overly significant that's not already noted on the Details tab. Since my "Other Thoughts" run longer than the 3000 character limit, I will start them here, and then continue in to the "Other Thoughts" below. OTHER THOUGHTS: My test system for this review uses a Cooler Master ATX MidTower case (N82E16811119248), an Asus P9X79 mobo (N82E16813131804), an i7-3930K (N82E16819116492) and a Cooler Master Hyper 212 EVO heatsink (N82E16835103099). Power supply is an OCZ ModXStream Pro 500W (N82E16817341016). Both the case and heatsink came with Cooler Master fans. The case fan was labeled A12025-12CB-3BN-F1. It is spec'd as maxing out at 1200rpm and 17dBA. The heatsink fan was labeled A12025-20CB-4BP-F1. It is a native PWM fan. According to the details for the heatsink, it's fan is supposed to be capable of 2000rpm, 82.9cfm, and a max of 36dBA. The SP120 fans more closely resemble the case fan in terms of looks. All the fans consist of 7 blades, but the design of the original heatsink fan blades is a bit more exotic. The only significant difference in blade design between the case fan and this SP120 is that the SP120's blades are pitched slightly less; the blades aren't curved as much. My test consisted of noting the initial idle speed of the fans and CPU & MB temps. I then ran Prime95 on "max heat generated" setting to find the limits of the fans. I let the test run for approximately 15 minutes, which was long enough for the fan speeds and temps to stabilize. I used HWMonitor from CPUID.com record temps and fan speeds. For CPU temps, I used the highest recorded number out of the 6 cores. I feel this to be more accurate than the temp sensors on the motherboard that report CPU temps. For audio testing, I don't have an actual SPL meter to use when comparing the fans, so I used the voice recorder on my phone and held the phone in the exact same position for each test. I tested on both the intake and exhaust side of the fan. Then I saved the audio files to my computer and played them back, looking for any differences in the waveform and overall volume. The results seem to be pretty much as expected, for better or worse. The original Cooler Master heatsink fan ran a bit faster and a weee bit louder, and it's cooling scaled appropriately. The rear exhaust case fan showed little difference, so I will exclude those numbers. IDLE numbers CPU fan speed: ~571rpm Highest Core Temp: 45C / 113F (IDLE differences between the two units being compared are insignificant since neither fan is really being used at this point.) FULL LOAD, Cooler Master Hyper 212 EVO fan CPU fan speed: 1666rpm Highest Core Temp: 69C / 156F Reported temp from MB: 57C / 133F FULL LOAD, Cooler Master SP120 fan CPU fan speed: 1401rpm Highest Core Temp: 78C / 172F Reported temp from MB: 66C / 149F

Overall Review: ...(OTHER THOUGHTS continued from above section)... There IS an audible difference between the two fans. However, it's minimal (2dB give or take?) and that's measured approximately 2" aways from the center of the fan, with the air being drawn across the microphone. With the case buttoned up and you sitting a normal distance from your case, I don't believe you'd notice a difference in volume. You could possibly convince yourself you heard something, but I think most people wouldn't notice the difference in a blind test. In fact, my power supply still generated the most audible noise, so in that capacity, both my internal fans are really quiet. So all that being said, what's the verdict on this set of fans? I'll give it 3-stars because in my opinion, it's just average. Compared to other fans in it's class, it doesn't really excel nor does it fail in a given metric. For anyone that keeps up on cooling trends, it's fairly well accepted that faster fans move more air which generates increased volume. The SP120 fans have blades with minimal pitch and spin slowly, so as should be expected, you're going to get less noise and less air being pushed. Unless you have excessively loud fans that don't cool all that well or you are replacing cheaper OEM fans that are failing due to poor bearing design, these could be a good solution for you. If you are looking for a quiet fan for an HTPC, I think these would be a good fit. Listen to your existing setup; If you hear your power supply or video card fans more than your case or CPU fan, then these likely won't make much diffence in the "overall loudness" department. And if you don't need the PWM feature and/or your motherboard doesn't have the required 4-pin header, then you could probably get by with a similar 3-wire solution from Cooler Master or any other reputable manufacturer.

Pros: Very sturdy - good looking - these do exactly what they claim. The build quality appears to be excellent. After having noise & failure problems with some other big name fans over time these seem to be much better quality, and I hope they will last alot longer in their quiet operation.

Cons: Power cable is too short for many applications.

Overall Review: Over time I've seen that the 120mm and 140mm fans have shorter life spans before they get very noisy or just quit altogether and it seems the 140mm fans last shortest of all. My point in saying this is to highlight that making fans with better bearings has been very overdue and these types of fans will likely make alot of users very happy over time.

Pros: Hydraulic (fluid) bearings can't be beat. Works with Intel BMC fan controller. Very sturdy, high quality feel. Blows hard and is quiet. Spins up and down automatically (or manually with software) just as it should. Half the thickness of comparable fans. Rings are easy to change and look cool along with it's unique rubber boots.

Cons: The cable from fan to connector is very short. It may be a foot at most. This can cause issues for big cases. Includes screws instead of push-clips, which are easier to install and remove.

Overall Review: I can see this fan lasting a long time due to the hydraulic bearing and study design. Would be nice if it had a 4-pin extension cable or just double the length and include a twist tie. Lol. Also, some Corsair fan controller software would be a neat option.

Pros: Great fans. I originally got the Quiet Edition version and the movement of air was horrible. Wanted something that would replace my stock case fan and stock rad fan (in push/pull) to get a little better cooling performance, as well as make them match. These push a lot of air through the rad. Dropped my temp by 2 degrees when on idle and 5 degrees when on load. They are also much quieter then the stock parts they replaced (probably because they have PWM). They have PWM! I love this feature on fans mainly because I have a Sabertooth 990fx gen3 r2.0 mobo that can support up to six (I think) fans. Both of these are plugged into the CPU (CPU and CPU OPT) ports so I can configure them based on the load of the CPU. When I'm not doing anything these fans are nice and quiet. When I'm in an intense gaming situation, or stressing the CPU for any other reason they max out cooling performance. It might seem stupid, but I really like the different colored rings that you can put onto the fans. My build has a red theme so these fit in perfectly. I like that they don't have LEDs because I have enough of that from the case fans in the front (too much actually). Look up the Corsair build they did (something like 26 fans) looks awesome!

Cons: When maxed out to 100% these can be pretty noisy. For me it is a null issue because A) they never get to 100% and B) if they are above 60% I'm gaming and I have noise canceling headphones on so I cannot hear them. You don't buy these to be quiet, you buy these to cool, and that is exactly what they do. If noise is an issue for you I suggest you get the Quiet Edition of this very same product. They don't move nearly as much air, but they are much quieter even at 100%. No con's if you ask me, just thoughts to be aware of. This fan has done the task I wanted it to do well.

Overall Review: Sabertooth 990fx gen3 r2.0 AMD 1055t OC'd to 3.77Ghz 16GB G.Skill ddr3 1600 mhz ram Sapphire Radeon HD 6850 OC'd OCZ Petrol 256GB SATA III SSD OCZ ModXtreme 750watt PS Antec df-85 case