Video card problem (-_-)

I bought a new computer, I have been using it for half a year
Intel Core i7-3770 3.40GHz, 3901 MHz
16g RAM
windows 10 x64
video card native gt630 2gb
recently decided to change the video card, took from the old computer that gts 250 1gb, I thought for a long time which one is better, I decided Check it out on a new computer. I installed it like I uninstalled the drivers correctly, installed the vidyuhu, connected it to the power supply, installed new drivers. And the
trouble is the computer began to slow down, it turns on for a long time and the main problem of the game does not start, I checked it on DYING LIGHT, DEAD RISING, FALLOUT 4, MAD MAX, reinstalled no sense, but GTA 5 started up, the graphics became much better FPS increased, so I don't want to change it back.