The motherboard PHD1000 is plugged into the PCI-E slot.The PCI-E (Peripheral Component Interconnect Express) slot is an important slot on the motherboard for connecting a variety of expansion devices, such as graphics cards, sound cards, network cards, etc. The PCI-E slot utilizes high-speed The PCI-E slot utilizes high-speed data transfer technology to provide higher bandwidth and more stable performance for devices that require large data transfer and high-performance computing. The PCI-E slot on the motherboard PHD1000 provides users with flexible expansion options that allow them to connect the appropriate devices according to their needs.