well, that's why they invented an active converter dude
i'm using a 1050ti on a real old monitor (no digital output AT ALL)
just plug in an active converter and i can use the HDMI port of my 1050ti with the VGA port of my monitor XD
u should try that
however if u already bought the GT 730:
yes, it'll do (this is coming from a guy who use GT 630 before changing to 1050ti)
even my GT 630 can play dota, csgo, skyrim smoothly on 768p with tweaked settings and GTAV on the lowest setting...