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

M2 SSD Schraubenset Abstandshalter für ASUSASRock Mainboards m2 slot mainboard Likewise, some motherboards come with their own M2 slot heatsinks Mother board heatsicks are usually cheap likely not even aluminum so m24 slot So I have a bit of confusion here on which Slot do I use Motherboard manual says following -For 3rd gen AMD Ryzen Processors, the _1 supports PCIe

m2 slot screw Understanding PCIe WiFi Adapter in ASUS Prime H770-PLUS D4 Mobo slot But I may still decide to use the slot after all, and