TrustedReviews covers two of the new X-Fi cards from Creative, the Xtreme Music and X-Fi Elite Pro

Creative has never skimped on features but in trying to be all things to
all people sometimes gets into difficulties. All flavours of the new cards share the same core X-Fi processor and have common headline features. There’s CMSS-3D and 24-bit Crystalizer, which together are referred to as Xtreme Fidelity and then there’s EAX Advanced HD 5.0. The two higher-end cards also add X-Ram to the feature list. This is 64MB of on board memory dedicated to audio. This can be likened to local texture memory on a graphics card, enabling developers to place onto the card directly.

Creative X-Fi Xtreme Music & X-Fi Elite Pro