Unfortunately, we do not have any personal user experience with this product, but I would be happy to forward your question to the Community, perhaps a Community member will be able to help you 😊.
Otherwise, I would recommend that you start a Community discussion about this so that more people become aware of it.
You can start a discussion in the "PC" section at the following link: https://www.digitec.ch/de/s1/community/producttype/pc-18
According to the manufacturer's information, an MSI mainboard is installed. In this case, the "Mystic Light" software is required. With this software you can control or configure the compatible RGBs.
According to our supplier, the tower is equipped with 4x 8GB RAM. Since the "MSI Z490" mainboard only has a total of four slots available, there are accordingly no more slots free.