Would be used mainly for internet browsing
https://www.one.de/one-office-pc-advanced-io07-intel-cpu-zusammenstellen
https://www.one.de/one-office-pc-advanced-io07-intel-cpu-zusammenstellen
350w is enough for GT 710 as long as it's a trustworthy good quality brand (eg Corsair or Seasonic) and not some cheap rubbish.