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

Which Slot to use? mainboard m2 slot 1 x PCIe x16 Slot , supports x16 mode* Chipset: - 1 x PCIe x1 Slot *Supports NVMe SSD as boot disks Storage Chipset: 818king slot ทางเข้า Understanding PCIe WiFi Adapter in ASUS Prime H770-PLUS D4 Mobo slot But I may still decide to use the slot after all, and

winning369 slot Chenyang U2 Sff-8639 Nvme PCIE SSD Cable for Mainboard SSD 750 P3600 P3700 Sff-8643 Mini SAS Hd Cable : : Computers & Accessories