Is it worth it if I attach an external graphics card to my laptop (8gb RAM, currently gtx 1050ti and Intel i5-8300H)? I have the rtx 2070 in mind.
Would keep away from it. The technology is not so well developed yet. In part, this is just too expensive or not worth the performance.
Save a bit more and build an ITX PC that you can take with you
No.
A laptop with a 1050 already has a very fast graphics.
To play rather a PC. (3d games) You can cool it better.
Something decent used one gets already under 100 euro on Ebay.
Little tip… There's the department. "old PCs" or "classic PCs"…
I shot a 16Gb system with the best ASUS board and good graphics for 60 Euro.
Hardly anyone looks at it.
It's not really worth it. The GTX 1050Ti is not really bad. You can't use the full power of the RTX 2070 anyway, because the connection loses a lot of power. In addition, at some point even the processor limits the performance.