Summary: The advanced EAX in the Xonar is flawed, but it sorta works. If you want a full EAX 5 card, you have to go X-Fi. But that limits you to PCI, as the PCI-E version of the X-Fi lacks advanced EAX support. That makes the Xonar D2X the most feature-rich PCI-E card today, and that’s not a bad place to be—even if the EAX is faked.
Pros: The EAX 5 hack is commendable and the card’s LED lights add flash.
Cons: Initially spotty PCI-E support that must be fixed with a BIOS update.