Hi, I will be changing my GPU soon or definitely this year. I'm currently using a 7770 Ghz Edition. My question is, will 1GB be sufficient for upcoming games? I play my games at 1366x768 currently due to display limitation. Club 3D 7850 Royal King Edition is in my range which costs 195$ while Gigabyte 7850 OC 2GB costs 240$. Does more Vram justify 45$? I will be shifting to a 1080p screen. Tell me between these two since I don't have variety in country I live.