Here is an interesting copy and paste from SoundBlaster's website:
Xtreme Audio Needs An Xtreme Fidelity Processor!:
Imagine having the power of a second 3.4GHz processor (more than 10,000MIPS) built into your PC that was dedicated just to audio! That's enough additional power to process more than 10 Billion instructions per second! With Sound Blaster X-Fi that's exactly what you get!
Sound Blaster X-Fi is an XtremeFidelity Engine sitting at the heart of your PC, freeing up CPU resources so you get a performance boost. Sound Blaster X-Fi's immense power also enables the ability to overcome the compromised sound quality of MP3s/CDs, Movie and game audio, which was never possible before because of the limited performance of the PC and previous sound cards. This means that you get a sound experience like no other. Hear it once, and you'll never turn back!.......http://www.soundblaster.com/products...logy/xfiaudio/
Cutting Edge Architectural Design:
X-Fi has been in development for the last 5 years. In fact from the launch of the first Audigy card the designers at our Advanced Technology Center in California began working on the next generation of audio processor.
The goal was to create something that would answer all the needs of users for a future still 5 years away. They had to develop completely new techniques in processing audio and use the very latest technology to develop the physical silicon.http://www.soundblaster.com/products.../architecture/
Wonder if that rings true for our notebook cards as well, I would have to assume somewhat so as It has to use the same or very similar X-Fi Processor.