hardware and performance

Hi

I'm new to the world of DCS , so I dusted off my old PC and downloaded some modules that I'm trying to learn how to fly.

cpu= intel e8400 3ghz

gpu= ge force 730 2gb

6 gig ram

motherboard = asus p5q

os =w7 ultimate

HD=Seagate 500gb

I just replaced my old gpu (ati radeon 512 mb) with ge force 730 but I see NO difference in performance of the game graphics.

1) is my system so old that I have to keep settings at LOW no matter what gpu I use ?

2) is it true that if I change graphics settings in the game to HARDWARE RENDERING then I will see a difference ?

3) If so , how do I switch to hardware rendering ?

4) does each plane require an initial set-up of the joystick ? or there is a one-for-all profile that can be used ?

Thanks in advance and please forgive my lack of knowledge of many things in this game.

Regards

F.S.