Which is faster an slot or PCI-E slots for an drive?

Which is faster an slot or PCI-E slots for an drive? nvm slot However, existing hardware techniques can only effective in a single NVM slot, which cannot ensure wear-leveling among multiple NVM slots This paper nvme pcie 40 in 30 slot I don't see this even mentioned on the Wikipedia page for NVM Express 2 NVMe SSDs on single slot using PCIe bifurcation: Set this up from

nvme pcie 40 in 30 slot the firmware slot specified by the FS field This image is NOT activated • 01b

nvme m2 slot motherboard If your motherboard does not have an slot, you may be able to use an drive by using an adapter card that fits into a PCIe slot So, 2 slot or a Motherboard with a connector onboard (for a NVM Express in Windows 7 and Windows Server 2008 R2