Thanks for the replies everyone.
The cable that came with the HRT is Monoprice, but perhaps I'll try another heavier monoprice cable. The HRT seems to have problems with JRiver on both my laptop and desktop, even while connected to wall, I've lowered the Hardware buffer and a few other suggestions that were made by other HRT users. Admittedly, since I updated the firmware and JRiver, the problems occur with less frequency but still pop up whenever I ask JRiver (or my system) to do something else (for example, switching to Gallery mode while I have music playing will end up with the sound getting jarbled, then turn into a high pitched noise before completely cutting out). I doubt my laptop or desktop lack in capability, both are 3rd gen Core i7s, the laptop has 8GB of RAM and the desktop has 16GB of RAM AND running the O/S and apps off an SSD.
However, no persistent issues with Foobar. My thought was that foobar is a "lighter" program than JRiver, and might just draw slightly less electricity than JRiver. I was thinking perhaps thecombo is slightly less electricity plus a possible inefficient or faulty cable might be enough to cause the differences.
As far as the FiiO goes, I have yet to try it out on the desktop, but my laptop certainly wont pick it up as a DAC (but will pick it up as a storage device).
Thanks for the help, I needed to get a couple of cables anyway, I'll grab a few extra USB cables from monoprice.