Anybody noticed odd flickering artefacts when using a VGA connector?

I've got two monitors plugged into my work laptop and the one with the thinner VGA cable has a somewhat noticable flickeriness to it. The one with the thicker cable has it too, but to a much lesser extent. I'm thinking I'm seeing it because the laptop has a plastic body so badly shielded from the RF noise it creates? where my desktop PC which uses the same monitors and cables but is a metal box and therefore well shielded?

On the off chance, does anyone have a particular brand of VGA cable to recommend? normally I'd swing by the office and grab a few to try but with covid that's not an option.

One factor that could apply is that VGA is an analog signal, and because of that the thicker the wire gauge could mean less signal loss. I think someone mentioned this is important for eyestrain somewhere else.

    Oh, one more thing, try setting a custom resolution setting using CVT-RB instead of GTF. With the adapter I'm using on my display with my GPU it makes the screen look subtly more stable.

    dev