How much of an upgrade will this new CPU/Mobo/RAM be?

It's going to be a pretty big jump. I did something similar but what I don't understand is why your still sitting around 4 gig's of ram? It sounds like your trying to build a gaming rig and your going to short what you can do with ram. Yes you have fast ram and yes you can OC it, but why not put like 12 gigs in? You can go up to 32 gig's with the board your getting. Your computer is going to be a beast. I do wonder what kind of video card your going to get. I see you only have one slot for PCI Express 2.0 tho. Your going to have to get a monster video card with that rig or it's going to be all for nothing.