Adding More PCIe Slots to Your System Adding more PCIe slots via expansion cards can be a workable solution for users who want to increase the capabilities of their system. With the help of these expansion cards, users can expand the motherboard's available slots withdazzle me slotsout having to completely rebuild the system. Professionals who need several GPUs for tasks like rendering or machine learning, as well as gamers who wish to improve their gaming experience with extra peripherals like sound cards or capture cards, will find this option especially helpful. Verifying compatibility with your current motherboard and power supply unit (PSU) is crucial when thinking about expansion options. For some expansion cards to work properly, extra power connectors or particular BIOS configurations may be needed.