<Tr> <Td> </Td> <Td> 59--66 </Td> <Td> PCIe × 4, SATA and SMBus </Td> </Tr> <Table> Maximum component thickness on M. 2 modules <Tr> <Th> Type ID </Th> <Th> Top side </Th> <Th> Bottom side </Th> </Tr> <Tr> <Td> S1 </Td> <Td> 1.20 mm </Td> <Td> N / A </Td> </Tr> <Tr> <Td> S2 </Td> <Td> 1.35 mm </Td> <Td> N / A </Td> </Tr> <Tr> <Td> S3 </Td> <Td> 1.50 mm </Td> <Td> N / A </Td> </Tr> <Tr> <Td> D1 </Td> <Td> 1.20 mm </Td> <Td> 1.35 mm </Td> </Tr> <Tr> <Td> D2 </Td> <Td> 1.35 mm </Td> <Td> 1.35 mm </Td> </Tr> <Tr> <Td> D3 </Td> <Td> 1.50 mm </Td> <Td> 1.35 mm </Td> </Tr> <Tr> <Td> D4 </Td> <Td> 1.50 mm </Td> <Td> 0.70 mm </Td> </Tr> <Tr> <Td> D5 </Td> <Td> 1.50 mm </Td> <Td> 1.50 mm </Td> </Tr> </Table> <Tr> <Th> Type ID </Th> <Th> Top side </Th> <Th> Bottom side </Th> </Tr> <Tr> <Td> S1 </Td> <Td> 1.20 mm </Td> <Td> N / A </Td> </Tr>

What is an m2 slot on a motherboard