Calling them RTX 20 series instead of GTX 20 series is just a marketing ploy to make everything seem new and fresh, which it is.
So let’s talk about what you’re really asking, which is what is the difference between 10 series and the 20 series.
Well the 10 series is Pascal architecture which is 16 nm transistors and the 20 series is Turing architecture which is 12 nm transistors. What does this mean? Smaller transistors, which allows you to fit more of them in the processor, and this directly relates to better performance. Generally you can expect 40% higher FPS on new upcoming graphically impressive games.
You WILL get 30~40% better performance in new games, and I am fully aware that many reports say that the increase is negligible. Most of those reports are comparing old games such as GTA V (yes, GTA V is really old now… a full 5 years which is ANCIENT in computer terms) that are mostly CPU/engine bound and can’t benefit much from faster architecture.
The other major difference is new technology. There are RT cores that will handle raytracing. Yes, many people are saying that this doesn’t work well and doesn’t look much different, but they’re mainly comparing Battlefield V, and we know EA is incapable of releasing a game that isn’t plagued by bugs on release. BF 5 is not a good tech demo, but Atomic Heart is;
There are also Tensor cores, which are massively helpful for AI. Yes, they are mostly dormant in games right now, but it won’t stay that way for long. Soon AI (real learning AI, not the bots that we’ve been calling AI all these years) will be incorporated into video games. The possibilities become quite frankly limited by our own imagination at that point. Here’s a tech demo of Nvidia having AI on Tensor cores creating and rendering a world in real time.