Hi, I'm casual gamer. I just upgraded my system with Gigabyte H61-DS2 MB & Intel G2020 processor. I already have ATI Radeon HD5450 DDR3 1GB graphics card. But I want to know that can I able to handle some old games (GTA 4, Crysis Warhead, etc) in low-middle settings with Intel onboard gpu i.e. Intel HD 4000 which has only 64mb dedicated graphics as I know. So I need to install my Radeon HD 5450 graphics card? Is Intel HD 4000 onboard shared memory is better than Radeon HD 5450 in terms of gaming? I got 6.1 ratings for gaming on Intel HD 4000 & 5.9 rating for gaming on ATI Radeon HD 5450.