core i3 with 430 is better than onboard graphic , but for gaming g2020 with 740gpu is far better.
when i had g2020 + gtx 650 oc i played many games at high setting in 1600*900 (2013 titles)
but some games like dragon age , far cary , COD and future AAA games won't run on dual core cpu .
save more money and get core i3 with better gpu (at least radeon 260x)