Originally Posted by ThisHertz
FDB is sleeve bearing with grooves.It is still fluid lubricated
I did some research and it seems Cougar fans are famous for ticking/rattling when mounted horizontally.Noctua's seem fine.
I also found this list on 140mm fans.
Gonna get a BGears B-Blaster and see how well it undervolts.Should have just gotten a 240 rad and use GT 13 or 14s
Well, I currently have F14's which are marketed as FDB but are a cheap sleeve bearing. They are not as dreadful as the Phobyas I had before but they can make a few annoying rumbling noises at certain voltages. They are pretty quiet at the lowest setting though (I think that's 4.5 V on my NZXT sentry mesh fan controller). There's a PWM variety as well. Only recommended if you can get them cheap (I paid € 7 each for mine, PWM version was € 8), then they are one of the better cheap fans IMHO.
You are right that FDB is very much like a sleeve bearing but it is definitely more advanced.
There's a very interesting article about the whole HDB/FDB thing here: http://www.hardwaresecrets.com/printpage/The-Truth-About-Fluid-Dynamic-Bearing-FDB-Fans/1807
. Definitely worth a read if you're about to buy fans.
The fans I currently have in my wishlist for my top rad are the Aerocool Dead Silence fans. I'm still waiting for some more opinions and reviews before buying them so I don't know how well they do horizontally. But they are definitely silent. Static pressure isn't amazing but it isn't bad either (at least enough for my Alphacool UT60 which has a low fin count ).
EDIT: I understand it's a bit of a PITA to find proper 140 mm fans but they are coming out slowly TBH. The GT's are just too damn good, that's the biggest problem Edited by Bloitz - 4/2/14 at 8:35am