PCIEx16 drops to x 8 when M2 SSD is installed???

PCIE to Dual NVME and SATA Expansion Card m 2 expansion slot QM2 series PCIe cards add support for NVMe SSDs to a QNAP NAS, allowing users to configure SSD caching, a caching pool, or an auto-tiering volume to m2 slot 2 SSD , such as a Samsung 950 Pro or Samsung SM 951, to a PC with an available x4 PCI Express expansion slot You can mount the PCIe drive

m2 pcie slot DS-33170 - 2-Slot NVMe SSD Expansion Card PCIe PCI-E x4, Digitus · DS-33170 - 2-Slot NVMe SSD Expansion Card PCIe PCI-E x4, Digitus · Your data,