I have a friend with the same Processor as yours but 2GB of RAM. Though he has a dedicated Video Card and getting around 20~30fps worst 10~15fps in crowded areas.
Seeing your using Intel G33/G31. It looks pretty grim since the game is graphically demanding not witcher level or battlefield but it requires a somewhat decent video card and the game is badly optimized.
I have a i5, 8GB of RAM and a GTX 660 and boy my frames drops to 12~15fps then spikes to 60fps. sometimes just randomly drops.
IMC will optimize the game soon and hopefully lower the minimum specs requirement. Not everyone can afford a decent PC but seeing a game that can run on 10~15 year old PC’s is a Plus.