All onboard video is only able to give BASIC gaming. so dont expect a few years of playing new release games with the IGP
Keep the 5770 and you will be able to plan new games for a little while. If you want a card to be able to play all new games for the next 3 years or so you will need to increase your budget to $300 - $400 for a graphics card. and get something like a Nvidia GTX 670
No motherboard will give you high end gaming ability. you need a dedicated card.