this fan is definitely 90cfm... WITHOUT INSULATION

if you put it into your casing, there is some resistance from the case it self... those dust filters and metal grills slows the air down

im using 1 unit of 90cfm fan in my comp as an intake on my left side panel
the fan is so strong that it turns all the holes in the case to exhaust air from the case...

i has only 1x 80mm fan and 1x 130mm fan in the power supply as an exhaust and both of the fan did not produce as much air flow as 1 unit of 90cfm fan

i added a homemade dust filer onto the fan so capture every incoming dust and it really works...

my pc is clean and i do not need to do much maintainance except cleaning the dust filter

this fan very low noise ?
or got others fan better than this or low noise than this ?

low noise but how bout the performance ?

hmm yateloon is my choice. but if cant find it, i'd prefer xlf's over coolermaster

If you feel nothing when putting your hand behind the fan exhaust..means your fan is not moving at full speed..probably coz not enough power..

I've experienced this before..and after changing the power cable it runs at full speed. Besides if you read this thread, there are users who can feel the air being pushed out.

Its not a pure 90CFM fan but also not a pathetic 30CFM fan as what you claimed. Read this thread and you'll know it runs around 60-70CFM..

It looks like you din read the whole thread and posted this rubbish -.-