I am pretty dumb when it comes to higher nerdism, but my rednecks logic got stuck there... i5, 4 cores, 10gb of ram, 1gb Vram...and only thing you can do is check email and run lfs? My pc is over 4 years old, specs doesn´t look as fancy as yours and yet still i can run BF3 on high settings smoothly and pretty much every other "high-end" game i´ve tested so far....
edit* oh i see.... a video card is yours bottleneck...