I know that it has worked for most of the users and I'm happy with that and I appreciate all your work on this don't get me wrong. It is just that when you return your defective unit and don't expect new one to be defective at all And yes, I tried it with the adapter, rpm dropped to -2000rpm. And as I thought it is something that is loose inside the pump. Well I got my money back and will be using air cooling or custom loop now on.
Really big thanks to wlw wl and all of you
Nice to see that corsair has found the problem.