(Build Help) Moving Alienware x51 r1 Parts.

###Build Help/Ready:

Have you read the sidebar and rules? (Please do)

Yes

What is your intended use for this build? The more details the better.

Playing games like fallout 4, dark souls 3 an so on.

If gaming, what kind of performance are you looking for? (Screen resolution, FPS, game settings)

High settings, My current screen resolution is 1680x1050. 30-60 fps.

What is your budget (ballpark is okay)?

500-600$

In what country are you purchasing your parts?

USA

Post a draft of your potential build here (specific parts please). Consider formatting your parts list. Don't ask to be spoonfed a build (read the rules!).

I would but I am unsure of what parts to search for that would work.

Provide any additional details you wish below.

I'm sorry, First time trying to move into PC building. I currently have an alienware x51 which I bought a 960gtx reference for. It worked out o.k but i noticed it heating up to about the mid 80's after 30 minutes of guild wars 2 at the highest setting.

So I decided I wanted to move the 960gtx, hard drive, I7-2600 CPU as well as the 8 gig memory. While buying a new motherboard, Case and Power supply. I'm very new to all of this but after my experience with the x51 I would like to start heading towards the right direction.

I would appreciate any help.