Originally posted by: WobbleWobble
SilentBoost is not 21dBa like advertised. If you're lucky and get the version with a Panaflo, you'll get the "M' which is 28dBA and spins at 2450RPM. If you're not lucky you'll get the non-Panaflo version which is louder. The non-Panaflo version has a -01 suffix to the model number.
The Panaflo L1A is rated 21dBa and their rating would hold true if they did use the L1A, but they don't and is misleading.
And yes, you can hear 21dBa. Only when I undervolt my Panaflo L1A do I consider it quiet
I ditched my SilentBoost because thought it was too loud. I bought a Zalman CNPS-7000A and it's noticably quieter while also being a better cooler.