wtb sound card for gamming~~~~

i just need a sound card for gamming...(try less work on my MB)
Xonar DS PCI VS X-FI XLTREME AUDIO PCI EXPRESS SOUNBD CARD VS X-FI XTREMEGAMER which its better?  and y ???



btw im using 2.1 ...

X-FI XTREMEGAMER have x ram ~

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=.=" nowadays really dont know anything about sound card.....
whats xram really do ?

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