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.
Nokia 5.1 has a single channel 3GB RAM. The RAM frequency is 933 MHz.
Yes, Nokia 5.1 does have the fingerprint sensor. It is located on the back panel of the phone.