Many games do. Not 4096, those are *software* mixed. It's 128 hardware-mixed channels. Most games are using about 60 channels, but with on-board, they trim down to 20 (on-board can't do more than 24 software channels) and this results in problems. Some sounds disappear or simply don't sound as intended.
It's not a big deal, but you asked what those cards have that the on-board doesn't. And I answered. Whether you want that or not is your decision. I don't have an X-Fi either. I'm on a cheap SB Live 24-bit that also lacks hardware mixing. But in contrast to on-board sound, it has Windows drivers that don't suck (64 software channels instead of the 24 of on-board drivers). In some games (like Colin McRae Rally 2005, Assassin's Creed, Gears of War, Oblivion) playing with the on-board chip (some Intel HD compatible thingy, forgot the brand, and a realtec AC97 on my older board) was no good. There was sound stutter, crackling, sound lag, and other artifacts. With Creative's drivers, all is perfect![]()



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I never bought one but when seeing one of those beauties in action they make EAX look like a cheap hack. EAX is just like a filter applied to audio in real time (through the mixer) much like a photoshop filter. Where as Aureal 3D was able to process the sound based on geometry in the game engine. Maybe unless video cards can start doing that, that kind of stuff is like comparing real time ray tracing to static light mapping.
