I have a Dell OptiPlex 780 SFF and mine has Intel Core 2 Duo E8600 @ 3.33GHz the best one for Dual Core from Dell but my question is that for games is it better to have slower quad core or the faster dual core like mine? Also I see that I can actually upgrade to totally of 16GB DDR3 if I wanted too but I only have 4GB now. I also have 500GB HDD. On Dell specs it says only 8GB since that time they didn't make huge rams that had like 4GB each stick so having 4 of them would go up to 16GB.