Ever since I bought this motherboard, Asus P8P67 Deluxe I had crashes with pulseaudio. Almost always if I tried to play multiple sound sources, like not stopping a video or music with you tube playing or something or running smplayer and audacious at the same time. This was under both Ubuntu, and later when I jumped to Fedora. Decided to bite the bullet and get a Xonar DSX, and no more crashes. The one thing is to configure it as 7.1 card in in the pulse settings, even if you're only using a 5.1 speaker setup, otherwise your speaker arrangement will be off. The other caveat is that the card requires a 4 pin floppy power connector. It comes with a molex adapter, though. Apparently a 1x PCI-E slot supplies less power than a PCI slot, so it needs the extra power. Nothing that can't be worked around, so I'm happy with mine. Totally worth it. I had stockpiled a bunch of old SB live and audigy cards for a long while, but since I dual boot for games, win7 didn't play as nicely as linux with those old cards. Those old EMU10k1 based chip cards were so awesome under linux. Actually had fantastic ALSA drivers that could do hardware mixing with no sound server, but don't get me started on that. I could go on all day about how the real problem with sound under linux is crappy drivers and we shouldn't need a sound server. But I digest... The xonar has been a great upgrade. I disabled the realtek in the bios, and the card was detected by fedora without having muck about with loading modules.