M.2 PCIe GEN 4x4 Series

X70
PCIe GEN3x4 NVMe 
Up to 3500MB/s

M.2 PCIe GEN 3x4 Series

S90
PCIe GEN4x4 NVMe
Up to 5000MB/s
S70
PCIe GEN3x4 NVMe
Up to 3500MB/s
S68
PCIe GEN3x4 NVMe
Up to 2500MB/s

Portable Series

P20
Type-C to Type-C
Ultra small size
H90
PCIe GEN4x4 NVMe
Up to 5000MB/s