https://wccftech.com/red-dead-redemption-2-pc-performance-explored-finally/

There's more RAGE to Red Dead Redemption 2's PC launch than just the engine.  The PC launch of Red Dead Redemption 2 has leaked at least once a month since the game launched on Xbox and Playstation just over a year ago and this past week it finally released with much anticipation of the new Rockstar game launcher and the Epic game store. Neither of which when too smoothly, to say the least. RDR2 is using the latest iteration of the Rockstar Advanced Graphics Engine, or RAGE, and has ditched DX11 in favor of being able to choose between Vulkan or DX12 for your preferred API. There are more than enough people out there having issues that are preventing them from even getting the game to launch and those who are able to get it to launch are finding not only a graphical feast but one that harkens back to Crysis with its ability to bring even the strongest systems to their knees. This has been one of the most frustrating and time-consuming performance analysis that I have done in quite some time thanks to the occasional crash, constant restarts after simply changing the resolution and with each benchmark run. At the time of publication, I'm still not 100% complete and will be updating the uncomplete sections over the coming days.

Thankfully Red Dead Redemption 2 has built-in benchmark utility that is fairly representative of typical gameplay and we used this to measure our performance. We used the last section of the benchmark that accounts for a 128 second run of typical gameplay and used Frameview to extract our results metrics rather than relying on the number that the game presents to us.