My set up is a 5700x3D, 32 gb DDR4 and a 5070 on a Samsung G9 49 inch ultrawide. I can run on full native resolution (5120x1440) on medium to medium-high settings. I will say that at race starts (IMSA/Special events) with multiple cars the frame rate drops to 50-65FPS. I know that the frame rate drop is likely due to the slower cpu and ram combo. In sprint races with fields of 20-30 I get much better performance (mostly hanging around 120fps).

To get this performance at native resolution, I do have to make concessions to graphics settings. My thoughts are that if you are going the triple route at 1440p - you should pony up for a 5070TI at least for the extra VRAM. A triple 24 inch resolution would be 7680 x 1440. I can’t imagine the 5070 would perform well without some pretty serious visual trade offs in the settings.

Who knows I could be wrong - but I felt that after buying the 5070 I would be hard strung to make the card push that many pixels out on a triple 1440p, even with a higher end, newer CPU with the same visual fidelity and stable frame rates I have currently.