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

PCIEx16 drops to x 8 when M2 SSD is installed??? m2 slot mainboard This #short video quickly describes how to determine which slot is the best slot on a m2_1 slot M2 slots that is not shared with the GPU PCIEx16 slot However, in MOBO Intel i7-6700K Processor

m2_1 slot Likewise, some motherboards come with their own M2 slot heatsinks Mother board heatsicks are usually cheap likely not even aluminum so

m2 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 I had an Asus HYPER X16 GEN 4 CARD for 4 Nvme but it's OK for only one slot I should change to x4x4x4x4 in my bios Another idea was to