Space in pci slots
Please check these topics first.
The images available on the site suggest that there are 4 pci slots available in the default configuration. Question: As long as the video card occupies 2 of these slots there is room for two more expansion cards, such as a sound card, network or any other. The idea here is to try to take advantage of the space that was created with PCIe rizer of the video card installing others for various expansion cards.
By using the XL option, you will be able to use one more PCI on your motherboard for soundcard, PCI SSD, etc.