I have a PC at home that I believe is at least 6 years old. It has one of these as the graphics card which I now have connected to my TV via HDMI. I then bought some Logitech 5.1 speakers which I then connected to my TV via Optical cable.The sound from the computer is therefore now coming from pc (you don't say), to the TV, then to the speakers.
My concern however is whether I am truly experiencing 5.1 surround sound? All the speakers surely do produce sound but I'm not sure if the sound is just being spread across all or if it's true surround sound experience. Also, is the sound card even playing a role here (since sound is going through the gpu HDMI)?