<Tr> <Td> Windows Phone 8 </Td> <Td> 1 GHz </Td> <Td> 512 MB </Td> <Td> N / A </Td> <Td> 8 GB </Td> <Td> WVGA (800 × 480) </Td> </Tr> <Tr> <Td> Windows Phone 8.1 </Td> <Td> 1 GHz </Td> <Td> 512 MB </Td> <Td> N / A </Td> <Td> 4 GB </Td> <Td> WVGA (800 × 480) </Td> </Tr> <Tr> <Td> Windows 10 Mobile </Td> <Td> 1 GHz </Td> <Td> 1 GB </Td> <Td> 1 GB </Td> <Td> 8 GB </Td> <Td> WVGA (800 × 480) </Td> </Tr> <P> Maximum limits on physical memory (RAM) that Windows can address vary depending on both the Windows version and between IA - 32 and x64 versions . </P>

Difference between different versions of windows operating system