>>311660372
Quest 2 in Link mode does use your PC hardware to play the games. You can use the charging cable that comes with it or buy a different cable if you want an actual 3.0 one without dropping extra money on the official cable.
No idea how it'd be on those specs, but I know people were using other headsets on similar setups before.
Odyssey+ got discontinued a while back, and I don't think Samsung has put out a new headset yet. Some info about a new prototype was floating around a while back though.