GPU installation for the server, may need GPU enablement kit. Here the existing old thread about it: https://dell.to/3gdmRqK. But the kit is available for support GPU only. So this is for your reference.
As for sound card, I doubt it would work, as you may need drivers to work on the server. And you will need to install server supported OS.
If you do manage to successfully install both cards and working well, do update us here for sharing to other users.
DELL-Joey C Social Media and Communities Professional Dell Technologies | Enterprise Support Services #IWork4Dell
Did I answer your query? Please click on ‘Accept as Solution’. ‘Kudo’ the posts you like!