Will a pcie adapter slow the readwrite speed of the ssd?

nvme pcie slot   Dan nvme in pcie slot

Confused about , PCIe, SATA and NVMe SSDs? The experts at Crucial explain all you need to know about form factors, physical interfaces and more

PCIe x4 interface Up to 3,3002,900 MBs NVMe compliant with APSTASPM power management support  this mobo has three pci-e slots physically 1x16lanes ,2x1line What i found, the x16 slot is supporting only one pcie line according to

dual slot vs triple slot gpu 2 PCIe NVMe Adapter mit PCIe Bifurcation, unterstützt 2 x Now I wonder, what happens if I connect that PCIe switch to my PCIe x4 slot? Comments415 · Explaining PCIe Slots · M · Can You Install M · How to Install a NVMe SSD