Dell with a Core i5-1135G7 @ 2.40Ghz, 16 Gigs of RAM, and an Iris Xe Graphics using eight gigs of shared memory running Windows 10 20H2. Dell has updated the driver since my last video post but that one did not work with the game. Only FSR would work, so you will need to go to the Intel website to download driver version 31.0.101.3790 for the game to recognize XeSS on the GPU. You might need to check for driver updates every time a new game comes out using XeSS. You will need to watch the video in HD 1080p to see the frame rate counter.
Quick Comparison below
Tested at 720p
At least in this game XeSS has an issue with uncommon resolutions
I am watching the last video on my TV, which has a large screen, to see what you tried to point out. I couldn't find much of a difference from the video alone. The framerate seems similar, and there is some tearing but that's common to any setting because of Vsync being disabled. What did you try to point out when you said that XeSS has an issue with non standard resolutions?
I've continued playing Martha is Dead where I left when I was just testing how the game ran.
Thing is..., DX 12 version is still a beta. Once you get past the scene from your videos, dunno what breaks in DX 12 mode but, for the most part, the screen becomes some kind of black to dark magenta crush.

Some areas are just bathed on a black shroud you can't see a thing -there are paintings and stuff there and the girl mentions it, but as a player I couldn't see a thing-.
So in the end I switched back to the DX 11 version. But...., in DX11 mode the performance takes a big hit -the performance dip is huge, from 60fps to 40fps and it's a stuttering fest-.

I also enabled FSR 2.1 Quality in DX11, although in this game XeSS works much better when it comes to antialiasing at least, which is noticeable by the window in the narrow corridor that ends by the stairs that leads to the house's entrance. Here:
XeSS is not available in DX11 mode.