Following the success of the Spectre Fan Series, Spectre Pro ups the ante with an all-new design and enhanced performance. The high pressure and CFM design produces wicked cooling and is also perfect for watercooling setups. Its dual frame construction not only looks great, but also helps to dampen vibrations that cause unnecessary noise. Reinforced fan blades prevent warping at high RPM levels, while focused airflow ensures cool air can reach all of your installed components. With FDB technology for low noise and long life, and availability in both LED and non-LED varieties, Spectre Pro is the new gold standard in performance case fans.
Pros: Look very impressive; not overly loud
Cons: Took these apart; discovered that the so-called fluid dynamic bearing is actually a cheap rifle bearing similar to the original Spectres. Both the 120mm and 140mm versions are mislabeled as such.
Other Thoughts: They're fairly decent in terms of airflow, although the airflow is very chaotic and unfocused (bad for air tunneling), most likely a result of the dense angular grill. Not great as case fans because of lack of focused airflow; not great radiator fans because of lack of pressure. They look nice and are quiet, but for $15 you're overpaying by about $8 apiece.
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Pros: They Looking amazing!! Quiet at max RPM, Good static pressure, Great price point, and Oh yea they look amazing!! You will love these fans Highly recommend.
Other Thoughts: I don't know what the guy below me is talking about them making lots of noise. These are by far my quietest fan in my computer and by themselves I can barely notice them running at max rpm. I use them on a alphacool ut60 280mm radiator with a sunbeam 30w 6 channel fan controller. Again recommend them to anyone.
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Anything but quiet
Pros: Beautiful design. Absolutely stunning, in my opinion. Reasonable price.
Cons: Very noisy! At maximum RPM they are extremely loud (rumbly loud hum, easily audible over anything, and heard in other rooms). In order to be quiet, it needs to run at very low RPM, in which case airflow is correspondingly diminished.
Other Thoughts: I highly recommend a fan controller for these or software to limit RPM to a low value. And by low, I mean 30% of rated RPM or less.
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