Indeed, after a bit of fiddling, I did notice that only 2 ASIO channels were supported. My default realtek drivers support AC3 passthrough, so I was thinking maybe I could combine the two. However, now that you have confirmed that it only supports 2 channels, and that the SPDIF is not supported, I guess I was a little ahead of myself. You are correct, I am using a desktop. I didn't really check that all my speakers were outputting, but there was definitely sound and that ASIO was being detected. I am running an AMD Dual Core, so it appears it is not impossible for Intel and AMD to get a long after all.