Linkwarden has pretty minimal hardware requirements - it was tested on a VPS with 4gb of memory and it ran pretty smoothly, the most intense part is when you build the app, but once it's running it's relatively lightweight.
From their website. I wouldn't consider tested on 4gb vps having minimal hardware.
I use Linkding and I am very happy with it. Less feature? Maybe. But it's a bookmark sync. What do you need?