Since the GraKa market is currently on the A * s * h, NVidia is producing 1060 units again.
Since I can't stand playing on my potato laptop anymore, I want to assemble a PC myself.
I'll take a 1060 as a GraKa and later upgrade it with a 3060ti or, if it's already out, with a 4060ti.
Could I then install the 3060ti / 4060ti together and would then have more power? Or is it not possible?
Nope. 1. Not possible because of different chips. 2. Sli no longer exists. Was basically eliminated by Nvidia this year.
"Could I then install the 3060ti / 4060ti together and then have more power? Or is that not possible?"
No, you can't. You can only connect two identical cards together. But that doesn't help. SLI or Crossfire is dead and causes more problems than if you only used one card. So it is better to bet on one strong card than on 2 weaker ones. In most cases you only get 20-30% more power and not twice as much as you might wish.
I have installed a GTX 1060 6GB myself and you can play most games with it well, provided they are not really hungry for hardware. I actually wanted to upgrade to an RTX 3060 (ti), but it will probably not work for me in the near future either. ^^
That all depends. If you are already investing in a good power supply and processor, that shouldn't be a problem.