Delta 38mm AFB1212VHE Rev3 from SWC + BGears 120-140 adapter

I had to see how high speed would do. Even if I can't put up with fans this high in speed, it's still impressive to watch now and then. This fan was sponsored by OldChap..

Seems to follow a similar trend as the 120mm fans. Starts out a bit high in speed, but it really has impressive CFM/noise ratio in the high speed area. Still very loud no doubt, but it's producing almost twice the CFM at similar noise levels as some of the 140s without an adapter.

Again, this is a bit apples to oranges with the adapter and potential shroud benefits, so take that into consideration as well.

VIDEO LINK
Not quite ready, but this should be after YT finishes processing:
http://www.youtube.com/watch?v=G6IiiCv6mJQ