Will it make a big difference if I update my Nvidia driver? Still running the one they released for GTA5.
I think it will.
A month or two ago there was a post on forums by guy who used to work at nVidia as an intern. He explained some of the stuff that nVidia does when it "tweaks drivers". Basically they look at how game-developers have designed their engine. And then they try to correct all the mistakes, dumb design-decisions and bugs that are in that engine. They basically make their drivers behave differently for different games. That goes so far as that they sometimes completely rewrite shader-code from scratch. A game gets released with shader-code from the developer, the shader is in a file in your game folder. But when you play the game, a completely different shader gets run. I guess AMD does the same.
That's enough reason for me to install a new driver every time I start playing a new game that has just been released. It might also prevent crashes because of bugs that were exposed by those new games.
I also like to mess with settings in nVidia iNspector. Especially in old games, enabling 4xSGSSAA if I have high framerates. Or enable SSAO in games that don't support it natively. I think you need a profile for a game to do that. Those profiles come with new drivers. BTW, in TW3 you should enable 16xAF in nVidia iNspector or in the nVidia control panel. Because the game does only 8xAF.
There is one thing to keep in mind. A new driver could have new bugs too. No problem, you can always downgrade. There are people who report crashes with the new driver, and a downgrade fixed it for them. No idea why. My TW3 has not crashed even a single time. (i5-3570K@4GHz, gtx680, 8GB ram, Win7). But in general, this is the reason why I only upgrade drivers when I start playing a new game. Not every time a new driver is released.