And do you think the Vega 56 is worth it over the 1660ti or 2060? I mean i have heard good things but also it seems like it only gets to peak performance after tweaking and undervolting etc. If i wasnt to tweak the card would it still be cool/quiet?
The Sapphire V56 Pulse would definitely be worth it over the 1660ti.
The 2060 is about £100 more and you only get 6gb mem - at 4k I find most games use more than that.
I'm a professional sound engineer and musician, so having a quiet pc is important to me - the Vega 64 nitro + is very quiet - fans spin @ 1130rpm on the power saver bios (you just slide a switch to the left to enable it) with fast FPS, temps under 70 deg.
Ask on the vega 56 owners forum about the Pulse card, and for some easy undervolting settings (I'd guess mem @ 945mhz/1000mv - P6 1632mhz/1000mv, P7 1672/1050mv) - That will mean nothing at the moment, but a quick look at global wattman in the radeon settings software and you'll quickly see what I mean.
If I can do it, you can do it - it's easy.