It's a complex equation, but in general, if you have an RTX 2080 Ti, you'll get a higher average FPS out of an i9 10900k than a Ryzen 9 3900x across most games.

It's a complex equation, but in general, if you have an RTX 2080 Ti, you'll get a higher average FPS out of an i9 10900k than a Ryzen 9 3900x across most games. Of course, that "more performance" often means "Running at 300fps instead of 270 fps", and it really doesn't matter. And, the higher the resolution, the more GPU stress you'll see, so at 4K-class resolutions its far closer to trading between CPU-bound and GPU-bound. But, then, DLSS2 complicates things further by amplifying what the GPU is capable of at even very high resolutions, and the RTX 3080 Ti is releasing in a couple weeks. So its only possible to speak in generalities about facts which are true in most situations. In the past decade, there has not been any competitively positioned products which would make an Intel/Nvidia PC not the generally-best option for PC gaming. AMD deserves a ton of credit for what they've done with Ryzen, and outside of gaming, BUY RYZEN. But, within gaming, it's a far more complex equation which depends on how much you're spending, what you're using the PC for other than gaming, if you're streaming, etc: In short, its such a complex equation that its better to just not think about it and flip a coin.