I use my UFX via USB and have had no problems whatsoever even with high channel counts at low latency.  RME drivers are the best in the biz. I record orchestras on location and the stability of the interface with the added USB port in front for a backup is a dream come true.  I have used Mackie, ECHO, Motu, Steinberg, E-MU, Tascam, M-Audio, and Avid (Digi) interfaces and the UFX is definitely the top of the litter.  Don't think twice about it, get one if you can.  

rumleymusic


I use my UFX via USB and have had no problems whatsoever 

+1

RME recommends using USB for lowest latency.
I think there is a 32 sample hidden buffer when using FW.
I think I have that right.
Love mine by the way...

T

I also have my RME UFX connected via USB. Been using it for the past 6 months and it's ROCK SOLID. As far as the OP's question about performance with high channel count, I can't comment...yet. I'm in process of building my home studio so haven't given it a thorough test, but with its limited use it's much more dependable and versatile than my previous interface (E-MU 1820m). TotalMix workflow is great for live monitoring. And the clarity of the sound is amazing. The 1820m converters were good, but this takes it to a new level. Another satisfied UFX customer!

All I have is the RME Babyface, and it has been working via USB2.0 for over a year fine.

Ok thanks for your comments Daniel, Bapu, Tom, DPete, and spacealf. I'm getting close to pulling the trigger on a UFX. You've helped me make the decision.