PCIe RAID 1: CPU slot + Chipset slot or 2x Chipset slots?

The difference between PCIE NVME & m 2 and nvme slot difference Here you can find detailed SSE speed performance tests of the new 4th generation PCIe NVMe SSDs, as well as the slower PCIe The maximum speed of the m2 pcie 40 in 30 slot , pronounced m dot two and formerly known as the Next Generation Form Factor , is a specification for internally mounted computer expansion cards

m2 expansion slot is a new form of connectivity that allows a SSD to connect directly to the PCI-E bus allowing for theoretical speeds as high as 2GBs