Nokia 5.1 has a single channel 3GB RAM. The RAM frequency is 933 MHz.
Nokia 5.1 has a 3GB LPDDR3 type RAM. It is a single channel.
Nokia 5.1 comes with 5V/2A charger output. It is quite fast.
No. Nokia 5.1 does not have the front camera LED flash but it does have the display screen flash.
Yes, Nokia 5.1 is made of Aluminium metal.