COOLER MASTER R4-L2R-20AC-GP Blue LED Case Fan

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good fan keeps it cool had 4 in my Rig and friends rig runs great to keep ur pc and components cool

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Great fan for the price. Runs really quiet even when I have 4x on my rig. Reputable company and a great product!

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Used 2 of these on my 212+ and they work great, dropped the temp on my phenom II by 20 degrees.

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good fan for the price, but it's bit louder than I expected.

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cool fan with dual use, case cooling or on a hyper 212

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Moves a great quantity of air for the cost point. My comp is now silent cant hardly hear it. If it wasnt for LEDs i wouldnt comprehend it was on. NONE! 3.1 Athlon 64X25770 Radeonfour gigs 800mhz DDR2

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cool fan with dual use, case cooling or on a hyper 212

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They offer very nice airflow. Dont find them too noisy even when cpu is fully load max stress. Nice LED design that fit my Thermaltake V3 black edition casing. Bought them for 4.99, very good deal considering the airflow is so important when building a PC especially for gaming.

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Not recommended for people sensitive to high-pitched noise, unless you have a good fan controller. I bought 2 of this with a Scythe Kaze Server fan controller to monitor their performance. My two new fans average max at 1900RPM, but it's close enough. The air-flow is really good, but the fan noise at max RPM is quite loud and high-pitched like a chainsaw.

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great fan, pushes some air. I would recommend using this as an intake fan because it looks cooler. the screws were a little too big, so i cracked a corner of the fan lol but i guess that was my fault.

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Overall, it is a great fan considering the price that pushes a lot of air. The LEDs are not too bright, which I don't mind. They can get really loud though, so a fan controller might help.

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Owned 3 of those for a few days as case fans. Excellent fans for the price. They push decent air volume and have acceptable noise at full speed. They come in various colors or with no led at all, so it can suit everyone's taste. Excellent buy.

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This fan has pretty good air flow however it gets a little bit too loud for me at max speed 2000rpm

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I blanked out while buying and thought this was a clear LED fan like i bought all my others as, so i was a bit surprized when i got it. But it blows good, better than my other fans so i dont mind. I'm using it inside the case anyways. Like i said, it moves air good, its silent, and it looks pretty good too. The blue lights arent as bright, but that is probably due to it being black instead of clear like my other fans. I am using it as one of the fans connected to my H50 radiator (Push-pull)

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still debated by many if this is really 90cfm, 69cfm or >69Cfm. Regardless, after pm, this is a great fan to add to a build.

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still is expensive but works nice

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excellent 120mm fan for the price, good looks, good airflow and relatively low noise for a 2000rpm fan. included 3-pin to 4-pin molex adapter is a nice added bonus. leds could be brighter but with the intended design is acceptable. overall, great fan.

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Price matched 2 of these for $4.95, used it with H50 watercooler (push/pull intake) and there was an instant drop  in the temps by 5 degrees (used a splitter to hook them to the CPU header).

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The fan is great and I have no regrets of getting it. Even though it may not be as silent as a noctua fan, it still does an excellent job of getting air into the case and providing a nice blue finishing touch to my build.

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Bought 3 of these for a new Coolermaster Elite 370 case.They move an amazing amount of air and are much quieter than the 90mm fans I had in my Thermaltake case.I would like to see how these fans perform with a voltage reduction.I would buy these again.

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Excellent price and performs very well. However its sounds much louder to me then 19dba at 1900-2000rpm perhaps around 25dba. It was to loud for me at full speed, I used an adapter and cut it down to 1100rpm and its now silent and still performs well for a $5 fan.

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I bought two of these to put on the front of an Antec 300 case. They work as a fan should work, rigid, pushes an expected amount of air. If you max out these fans or run them directly off power they can get a little noisy but personally the noise does not bother me.

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I bought these to replace the Antec Tricools in my 900 case. Don't seem quieter than the Tricools.

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I really like Cooler Master fans in general, they are reliable and cheap!

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I put this fan at the back of my case, but still the led is quite bright for me. ^^. But the fan works great. and not too load as well. I will buy it again.