IMO the airflow measuring procedure is incorrect. It also gives unrealistic results and unrealistic differences between fans as the testing procedure used by xbitlabs (tests in the bottle). And it only gives an idea about how different fans will operate in trash bags. :) I've found nothing about the...

DAve_M, can you tell me the exact RPM of the fan at 5 volt? Thank you in advance. BTW: here is what Scythe says about the differences between Kama FLEX and S-FLEX and why the Kama Flex is cheaper. As I know both fans are manufactured by ADDA and the Kama Flex series must be something similar to the ...

I've used the ULNA adapters with S-Flex 1200 and it's worked just fine. IMO ~ 600-700 RPM (never checked it with tachometer to see the exact speed). S-Flex 1200 has low power consumption.

I'm looking for a low noise 140 mm fans for my CM-690 case. The following fans are available in the shops where I live: 1. Yate Loon D14SL-12 (regular black) 2. Yate Loon D14SL-12 (transparent with LEDs) 3. Sharkoon S1402590S-3 4. Scythe Kaze Maru (a bit overpriced, I can purchase 120 mm Noctuas for...