Aurora R4, audio configuration

I just received a brand-new Aurora R4 replacement.

Specs are:

i7-4820K (4 cores, 10MB cache); 16GB quad-channel, Windows 7 Pro 64-Bit; nVidia GeForce GTX 760 1.5GB GDDR5; Integrated 7.1 Channel Audio

My previous Aurora unit came with Sound Blaster X-Fi Titanium sound card. What is the difference between the X-Fi card and the "Integrated 7.1 channel" card? I can't seem to find any details or specs, only that it uses the RealTek HD Audio Driver. What is the hardware configuration? And does it support all HD codecs?

I really loved the X-Fi set-up (the console, etc.,...)