For example, in January AMD announced the Ryzen 7 5700X3D, Ryzen 7 5700, Ryzen 5 5600GT, and Ryzen 5 5500GT. Then, in June, ...
It basically indicates a minor jump in clock speeds. For example, AMD Ryzen 5 5600GT is better than Ryzen 5 5500GT (up to 4.6GHz vs. up to 4.4GHz max boost clock). The third and fourth digits show ...