The Cisco C240 M6 Riser1A features multiple PCI Express slots, including 3.0 x PCI Express x8 (Full - height/Half - length), PCI Express x16 (Full - height/Full - length), and PCI Express x8 (Full - height/Full - length). This riser card is specifically designed for the HCIAF240C M6 All - Flash Server, providing robust support for various expansion needs. With a total of three expansion slots, it allows for flexible configuration and scalability, making it an ideal choice for data centers and enterprise applications that require high bandwidth and low latency.