Rhino V7 (WIN) vs. V5, why does my line anti-alising look trash?

Hi Variant,
Not just me then, first thing I noticed in V7 was lines looking like twisted ribbons.
The sleek pro look of such in V5 is lost.
I wondered if there was anti aliasing settings I overlooked.
Its a cruder appearance, and I just spent £3k on a dedicated Rhino and video editing PC Nvidia 3070 and 64DDR4 ram, and other top notch stuff. and before I was GTX970 and things looked GOOD.

so we are stuck with it I guess,

oh dear

Also colours are paler,

So card not the problem.