Works, but not very stable

After installing the drivers, the card is well recognized and established. It runs on my NAS server as a TV replacement for an old analog receiver I had sorted out. The quality is good. I run the box together with DVBViewer. Additionally, I have a CI + module in the box stuck to receive the encrypted ORF programs.

Everything would be so great, but unfortunately it is sometimes causes instabilities. The one way or another HD program is not correctly decoded or the program hangs.
Maybe it's the module, or on my not too fast computer (dual core). Somehow I have the feeling that the implementation over USB is to blame for everything that is not too reliable. If the part has once hung, then you have to also unplug the card, otherwise the computer can boot only after a very long wait.

All in all ok, but not very reliable for my device configuration. Nevertheless, enough for me, because I rarely use the television function.