Original Delta TFC1212DE 12cm 120mm DC 12V 3.90A 252CFM 4pin PWM with Speed Sensor Server Inverter Axial Case Cooling Fan

Really, really, really loud--It sounds like a jet about to take off, it's pretty awesome. It's also something you don't want to keep on full speed. If you do not supply adequate power, it won't even start up or will experience intermittent rpm throttling.You need a decent fan controller to quiet this beast to slightly more comfortable levels.It fires off a column of air that is quite narrow.Keep wires and any objects away from the fan, if you're in a tight chasis... you need some stellar cable management.I truly believe that the fan grill is absolutely necessary if you do not want to risk losing your fingers or risk chopping your wires, especially if you haven't decided on your fan placement yet.If you want to use this on full speed, you need a good 5" clearance on the intake end (honestly either end) if you do not want to create more noise. The fan grill should really be the only thing between this fan and the outside of your case. You shouldn't even worry about dust filters as dust will enter and leave in a push pull configuration.I use this in a Lian Li TU100B at 40% speed and it still sounds like a vacuum.

I just love these things, the produce enough cold air to cool off a room on their own. I have for my rig, an AMD FX 8320E on an Asrock Fatal1ty 970 Performance Motherboard, with a 600 watt psu, along with a nvidia GT 610 (2gb ddr3 gfx), and 14 GB RAM. I have the delta's setup on top of my case, and the temps couldn't be more satisfactory. 68 degrees Fahrenheit board temps along with a watercooled temp for my cpu of 65. Yes noisy but it definitely makes up for it in performance. i wouldn't recommend putting them on a liquid cooling radiator, air doesn't pass through as it should, or needs a longer shroud to make the cold air pass through the fins the right way would be my only guess.

I was thinking about slightly over clocking and wanted to be Mr. overkill.I don't know what I thinking at the time because I work next to a server rack sometimes.... I wasn't expecting it to be as loud, It reminded me of work so now I'm getting a 50w fan controller for the 80% of the time that max power will not be needed.Very hefty chucky fan. (weighs almost as much as grapefruit!) I often see smaller delta fans at work and thought about getting the beast model.To those of you getting cut.. I hope you can also keep from touching a stove/toaster/outlet/car fan/garbage disposal..... Long enough to retire!Well what can I say.. I'm a fan ;)

Shouldn't have played with it. It ran great off soild 12v (loudly but while moving more air than the other 11 fans combined). The problem arose when I tried to wire it to a 3 pin dc plug I had lying in a drawer. After I mated the black, red and blue wires together and connected it to a 3pin to molex adapter. I was greeted with a short spin and the magic smoke. It was great fun while it lasted and very powerful. Seeming to move more air than 3 200mm thermaltake pure 20s, 4 Rosewill sfs 120s, and 4 140mm Cougar Cf-t14sb4s combined.* Slight amendment, I test via 12v just after writing this and this monster is still alive. The small puff of smoke I saw didn't slow this thing down. Not to say you can't kill one your self if you wire it up incorrectly, but this is a durable product IMO.

WOW! The air off this thing can be felt 10 feet away when it is at full speed.I am using this thing as a "turbo" cooling option on my ballpark boombox. I had a SCYTHE 133cfm pulling solo duty inside the box circulating fresh air in and out across the sub amp to keep it cool. It worked up until July and August in South Louisiana. I added this thing with a switch and it takes care of business. The noise is there but with it inside of the box it isn't noticeable unless you are up close and the volume is down.

This fan is not responding properly to my 10 amp PWM motor speed controller. It will only slow from full speed to ~3/4 speed before shutting down. I think perhaps I should have ordered the 3 wire non PWM fan, as I cannot really use this as intended due to ridiculous volume and current consumptionI have checked the current consumption at 12.2 volts, and it is only 2.93 amps. Start up surge is only 0.10 more. 2 different meters read the same, both through the PWM controller and when hooked directly to 12.2 volts. Even at the slowest speed right before it turns off when powered through my PWM controller, is 2.45amps.It is rated at 3.90 amps. I do not have a way to measure CFM, but I believe the 252 rating. I have other fans rated at 52, 70, 110, and 170 CFM and this Delta fan moves way more air than any of them. I do have a 120mm fan grill installed. It will blow itself over. Be careful when first hooking it up without a blade guard.I have a Loud Vantec 92mm tornado fan rated at 118 CFM, and next to the Delta fan, it cannot be heard, and its airflow cannot be noticed, as the Delta's air velocity is So much higher, that the not inconsiderable Vantec's flow is entirely lost within it. The airflow is in a pretty narrow column. Restriction behind the fan significantly reduces airflow and increases noise. Just my hand 3 inches away reduces output by a good 30%, and increases noise. Restriction placed in front of the fan, get blown away, ha.When placed face down on a flat surface, it hovers about 1 mm off the surface.This product arrived from China about 3 weeks before the estimated arrival time and about 9 days after it was ordered. Well protected in a box just big enough to house fan, and one thick layer of bubble wrap, all around it.I tried moving the blue wire around which is the PWM feed but just could not get the fan to slow down enough with the PWM controller I was using. I'd love to be able to slow this thing way down, and also have that insane power when I want it.I might have to order the 3 wire version and hope it responds properly with my PWM controller

Good for server room cooling but nosey as a jet engine.