The Core 2 Duo has one thread per physical core, whereas the Core i3-3220 3.3GHz uses hyperthreading and has 2 logical threads per physical core.
In terms of overall gaming performance, the Intel Core i3-3220 3.3GHz is massively better than the Intel Core 2 Duo E8400 3.0GHz when it comes to running the latest games. Which Windows 10 is best for Core 2 Duo?.What are the major differences between Core 2 Duo and Core 2 Quad and Core 2 Extreme?.Is the Intel Core 2 Duo good for gaming?.Which is faster Core 2 Duo or dual core?.