CPU & PCIe lanes - Confused af halp plz?

Will installing a 2nd SSD compete PCIe bandwidth with GPU m 2 slot with pcie x4 lanes 2 slots with x4 PCIE lanes each m2 sata vs nvme slot PCIe Lane Distribution This Key-M slot shares lanes with the port Installing an device

m2 slot pc Curious why my Intel 660p SSD only gets one lane when is supposed to be provisioned with 4 lanes socket checked and fine,