Fans seems to do their job very well. It seems to have very good air flow, and they ate silent. But they were poorly packed, thin and weak buble wrap. No protection inside retail package. No protection beetwen units. 2 of 3 had 2 back plastic stem broked. Fortunatelly, they were working fine. If you're going to buy, ask for a very good protection package.
it's working no problem but i had to cut antivibration to fit the case