I don't think so. Thunderbolt is enough for 1070ti. So will CPU bottleneck? may be. I cant say no or yes because it depends on the game you are playing. Titles like GTA V are CPU bound and may require good cpu to squeeze all fps out.
Sorry for late reply,
U have 2 options, enabling auto login.
Use ifupdown for managing wifi.
To use ifupdown, u have to uninstall all network managers and follow this guild
Setting WiFi up via the command line - Raspberry Pi Documentation
I hope I helped you
In earlier days, days of celeron 1st gen. You had 32bit CPUS. Now most of all CPU are 64bit.
64bit cpu can run 32bit os as well as 64 bit os. If you want to have max cpu power, use 64bit os. But if you have 2GB ram (Idk why in 2K18) then gofor 32bit as it is light on RAM.
32 bit CPU cant run...