Nokia 5.1 has an ARM Mali T-860 MP2 GPU. It is a dual core GPU and GPU frequency is 700 MHz.
Nokia 5.1 comes with 5V/2A charger output. It is quite fast.
No. Nokia 5.1 does not have the dual camera set up.
Nokia 5.1 has a single channel 3GB RAM. The RAM frequency is 933 MHz.