can i run

Type "canyourunit" in web search bar for a rough idea

But question can not be answered if ya don't tell us resolution ... assuming 1080p for below

We can see here, that the 760 is 8% slower than the 670 on average
https://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_760/27.html

The 760 gets 36.9 fps in GTAV ... that should put the 670 in the 40 fps range at 1080p

gta5_1920_1080.gif