That is a good question which Mathias might answer because I would guess something vague like twice or thrice the score value of the recommended system spec's.
I don't have a really good answer to that. I just can say: You need a powerful graphics card for such a high resolution. If you set 200% scaling you need 4 times the performance compared to 100% scaling. So maybe this is ans option if you have a high end graphics card (e.g. GTX 1080 or RTX 2070).