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I ordered this fan from Sidewinder Computer Systems to replace my intolerably loud (45dB and a lot of bearing noise) 125CFM Y.S. Tech fan, and I have to say that so far I am most impressed.

The specs on the Panaflo:

120x120x38mm
2500 RPM
12v, 0.60A
103.8 CFM
0.26in/6.6mm H2O, 66.7Pa static pressure
41.5dB

While it officially moves 21CFM less air than the Y.S. Tech and is rated at about a mm less stactic pressure, there is very little bearing noise on the Panaflo and the the overal sound is much more tolerable. My Y.S. Tech fan was clearly audible a room or two away, even in a closed case. The Panaflo, though far from a silent fan, is barely noticeable over the ambient noise of my surroundings. It's lower pitched and vibrates less, so much more of the sound is stoped by my P182s side panels.

As for cooling performance (on a heatsink), it is slightly worse than the Y.S. Tech, but it's much better than any of the 120x25mm fans I have, even ones that a considerably more annoying as far as sound goes. 25mm thick fans really cannot match this static pressure at anywhere near these noise levels, even if they have a higher CFM rating.

It's also a very solid feeling, and well built fan. At 15 dollars it's a bit more expensive than an Ultra KAZE or the Y.S. Tech, but still a decent bit less than the other fans I was considering, such as a Sanyo Denki (similar performance but even quieter at 39dB, shame they cost 35 bucks), or a medium to high speed 120x38 delta.

I really think 2500rpm is my sweet spot with fans of this size. I can put up with 41dB, as long as it's smooth and not high pitched, but the 44+dB of most all ~3,000rpm fans is really not an option for me on my primary system.

Anyway, after I install my X3350 in a few days I'll post some pictures, temps, and maybe an audio recording.

I would definately recommend this fan to those looking for something affordable with a very good performance to noise ratio.
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Primary
(15 items)
 
Secondary
(13 items)
 
In progress
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CPUMotherboardGraphicsRAM
5820K @ 4.3/3.6GHz core/uncore, 1.225/1.2v Gigabyte X99 SOC Champion (F22n) 2x Sapphire R9 290X Tri-X OC New Edition (10036... 4x4GiB Crucial @ 2667, 12-11-12-27-T1, 1.37v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.05) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Cooler Master Nepton 280L 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Corsair RM1000x 
CaseMouseAudio
Fractal Design Define R4 Logitech G402 Realtek ALC1150 + M-Audio AV40 
CPUMotherboardGraphicsRAM
X5670 @ 4.4/3.2GHz core/uncore, 1.36 vcore, 1.2... Gigabyte X58A-UD5 r2.0 w/FF3mod10 BIOS Reference R9 290X w/Stilt's MLU 1000e / 1375m E... 2x Samsung MV-3V4G3D/US @ 2000, 10-11-11-30-T1,... 
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Noctua NH-D14 Windows 7 Pro x64 SP1 Antec TP-750 Fractal Design R5 
Audio
ASUS Xonar DS 
CPUMotherboardGraphicsRAM
i7-6800K @ 4.3/3.5GHz core/uncore, 1.36/1.2v ASRock X99 OC Formula (P3.10) GTX 780 (temporary) 4x4GiB Crucial DDR4-2400 @ 11-13-12-28-T2, 1.33v 
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Intel 600p 256GB NVMe 2x HGST Travelstar 7k1000 1TB Corsair H55 (temporary) Windows Server 2016 Datacenter 
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Seasonic SS-860XP2 Corsair Carbide Air 540 
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