Define 'Big Games'. The 7310 iGPU is decent, but it's no where near a gaming chip.
" the almost identical 6310 was only able to run low end games like Fifa 11, Sims 3 and Star Craft 2 single player in lowest detail settings fluently. More demanding games like Risen or Call of Duty series were not playable." - NoteBookCheck.net says this about the 7310.