"One thing that we noticed is that the Intel Pentium G620 had the same gaming performance as the Intel Core i3-2120. The Intel Core i3-2120 has a clock frequency of 3.3GHz and Hyper-Threading. With a 700MHz higher clock speed you'd expect the Intel Core i3-2120 to perform better than a Pentium G620, but that was not the case. Both the Intel Pentium G620 and Intel Core i3-2120 were found to have identical performance and that makes sense as both share Intel HD Graphics 2000 GPU's..."
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