If you want a decent gaming experience you will do yourself a huge favor by considering a low-end discrete solution like the NVIDIA GT 630M. This solution offers a clear advantage over Intel HD 4000 and is also better than Trinity because, besides offering better overall GPU performance, you arent tied down to a lackluster CPU. Three of the five games tested (Dawn of War 2: Retribution, Civilization 5 and Diablo 3) were playable even at 1080p on the GT 630M."
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips