MasterKunirock-There's no way on earth any 5$ usb audio card could be better than any motherboard built-in audio card
In the picture you posted, the traces from the audio connectors are running all the way across the motherboard to the DAC and filtering stage. This is how noise is introduced. The USB unit probably has worse filtering (with the cheap surface-mount non-elecrolytic caps), but it will probably have a much lower noise floor since it's hanging outside your case.
you know anything about shielding? that's the thing it's used to try and avoid those problems, also don't forget one is built-in, the other one is an addition, something that passes through another BUS (usb), try and think about anything that comes with that.
Knuckles_You can't argue with results.
bye rock glad to see you're leaving this thread
results?