We now have the option to install the JCAT USB Card Femto in your Sigao PC, enabling Audiophile USB Audio output for your USB DAC. You need to select it from the Expansion Port option list. You also need to select the 400W HDPlex DC Power option from the Power Supply option list.
There are 2 models that support this JCAT USB option:
Here is a screenshot showing CPU loading when using HQ Player to play a DSD512 44k file, using poly-sinc-lp-2s filter and ASDM7ECv2 shaper: