That's near enough what I have, I have a 3.5GHz quad core i5, 8GB ram and a Geforce GTX 960 and I run GTAV quite happily at 60FPS. I changed up to an SSD which is a must really. Most of the settings in GTAV are high, some I've knocked down a little (like textures I've put down one notch as 8GB is not a lot of RAM).
With other games it's generally OK, but Cities Skylines and Planet Coaster start to dip below 30 once the maps become complex. It'll do you fine for OMSI, as you can't use 8GB RAM in that anyway.