QUOTE(ntw @ Oct 7 2013, 02:29 AM)
using bitfenix spectre pro non-led, very quiet. another brand that i would give it a try is noiseblocker but their $$ is a bit higher
Noiseblocker is a good choice but they are expensive, and the air flow is not that good if i'm not wrong.
QUOTE(Clem1982 @ Oct 7 2013, 09:26 AM)
Artic F12 run at 1400rpm max speed so they're audible but should be a lot quieter than the CM Sickleflows at the same speed... if you want quieter but higher performance fans then you have narrowed your options to the likes of Noiseblockers, Corsair SP series and Scythe GT... you'd have to dig deep into your pockets though

Yup, run at max speed and they are audible. And yes, much quieter than Sickleflow for sure, but the performance are almost the same when both of them running full speed. 1400RPM vs 1950RPM.
Noiseblocker really that good ka?