Well done! Nice NZXT case and beautiful cable management.

Hey,

 Nice swap. I am considering the same thing.  Can  you give me some details on what it takes to get the power switch working. I talked to NZXT. The person I spoke with wasn't sure about the power connection from the case  to the 8700 mobo.  The guy told me... "so in order to get the top power button and USB ports working for this H510 case, you would just need to have a USB 3.1 Gen 1 Internal header to connect that to as well as a standard F_Panel header. With the H510 case it comes with that top USB Type-C header which requires a different USB 3.1 Gen 2 header (which comes with newer generation motherboards). If your Dell XPS 8700 motherboard doesn't have the USB 3.1 Gen 2 header, then that top Type-C port will just not work."    Thoughts?

XPS 8500 8700 F_PANEL uses something similar to INTEL.  YMMV

https://www.dell.com/community/Desktops-General-Read-Only/XPS-8500-Motherboard-wiring-for-new-case/m-p/4449008

https://www.intel.com/content/www/us/en/support/articles/000005643/boards-and-kits/desktop-boards.html

The Yellow Front Panel Audio is also Similar to Intel® High Definition Audio (Intel® HD Audio) or AC'97 (Audio Codec '97) audio..

https://www.intel.com/content/www/us/en/support/articles/000005512/boards-and-kits/desktop-boards.html

USB Headers are also Similar to INTEL.

https://www.intel.com/content/www/us/en/support/articles/000006933/mini-pcs.html