I have my computer hooked up to my stereo, The computer volume is usually between half to max. Usually around 3/4. Havent had any problems. I have a creative audigy 2 soundcard. If the computer is having problems you'll be able to hear it.
I also boost my soundcard output with a headphone amplifier that I am using as a preamp which is always turned up all the way. depending on your soundcard you may also have a digital output, which would be the best route if you could go it.