On steam, you can
see the statistics of computer components of a modern gamer . Currently, December 2009.
Audio Devices:
Realtek HD Audio output (-0.31%) 40.70%
Speakers (High Definition Audio (+ 0.13%) 5.78%
Realtek AC97 Audio (-0.59%) 5.10%
SoundMAX HD Audio (-0.09%) 2.47%
Speakers (Creative SB X-Fi) (+ 0.42%) 2.24%
SoundMAX Digital Audio (-0.23%) 1.68%
SB X-Fi Audio (+ 0.09%) 1.51%
C-Media Wave Device (-0.06%) 1.31%
Lautsprecher (High Definition A (+ 1.22%) 1.22%
SigmaTel Audio (-0.22%) 1.22%
Speakers (SoundMAX Integrated D (0.00%) 1.13%
HD Audio rear output (-0.03%) 1.01%
Other (+ 0.73%) 34.63%
')
Sound cards that support high versions of EAX have grown by a fraction of a percent, but in general they occupy 3.98% of the total.
We can say that “sound cards from Creative are the best for games” is already a myth. Instead of X-fi, it’s better to buy a good speaker system and / or a card with a better DAC and a lower signal-to-noise ratio (ASUS Xonar D2X, for example).