2x MCIO 8i (74pin), high quality Amphenol SMT slot. PCIe 5.0 x16, Gen5, 85-Ohm PCB, optimal traces. Lane mode needs to match your BIOS setting! This is NOT a PCIe switch. If both CPU & BIOS support bifurcation, this card can support the following applications: 4 Port NVMe SSD. PCIe x4x4x4x4 devices. PCIe x8x8 devices. PCIe x16 devices.
Operating system support: Windows/FreeBSD/Linux/Red Hat. With a low-profile bracket & a full-height bracket inside