If this is of any help:
Hi, when trying to find out the best settings to me for a 2070S in 4K, I’ve discovered that depending on the location there is more or less 3D items needed to be in the VRAM at a certain point in time, and the amount varies greatly sometimes with different settings. In the end, there are settings your video card could perfectly handle as-is (for example texture ULTRA because you got 12GB VRAM available) but in fact, in choosing ULTRA you’re also cutting back some room for other things which might be needed at the moment.
In the end, I’ve found a few settings affecting badly the FPS by themselves on this video card in 4K (like Ambient Occlusion which has a dramatic impact if above “LOW”) but there are other settings you’d rather be conservative with to get some room when needed.
Settings details here: