Why do external DACs sound worse than Realtek ALC256?

[LongKick64]

Which DAC do you have? Even if it doesn't have native ASIO you can probably jerry rig it using a piece of software called ASIO4ALL.

Topping MX3s

 

[BrokeAudiophileMan]

Topping MX3s

Googled it and it doesn't have an XMOS chip like most USB DACs do so ASIO may not be possible. I didn't realize they were making USB DACs without XMOS still... bummer. WASAPI though... totally an option.