I'm running mine at 23, as well, and no it doesn't matter. I can tell you I have the slowest CPU on my HTPC. I'm still rocking a 3770k for now. I don't think that matters too much to this equation. The reason I've chosen the settings I have is because I still wanted NGU for Chroma. Call me stubborn.
NGU AA low
Ordered Dithering
Scale chroma separately
Those are my compromise settings. At the very moment I have dynamic hdr turned off. So my tone map HDR using pixel shader settings:
min target nits: 700
color tweaks: balanced
highlight recovery strength: very high
output video in HDR checked
The apply dynamic clipping and apply target nits selection are currently unchecked. Which isn't an issue for me cause as I said I tend to use measurement files to get a little performance back. With a movie like BvS I'm rocking avg rendering of about 31ms.