i5 ATLEAST, 4 GB of ram is do able but 8GB preferred. Getting a dedicated GPU for a laptop is dum. Pay more money for a shit card just so it's portable ? Battery life will suck ass anyways so there goes your portability.
If it's for casual use, i5, 4gb ram, SSD.
otherwise i5 8gb ssd or i7 if you got the money but won't be a big difference unless you know you'll be running some intensive shit.
only thing I like about that laptop is matte screen.