CPU and GPU

[alphabeta]

is there any core due that will work fine with gtx 650 ?

[SageC]

The new Pentium G3258 if you want some overclocking or an i3-4350.

[ForsakenLive]

Are you looking to purchase a CPU for gaming?

It depends on your budget, an i3 will get the job done.

[RubyRoks]

a general rule of thumb is to buy a GPU that is IN THE AREA OF 1.5x to 2x the cost of your CPU. assuming LGA 1150, you'd be fine with almost anything, but for a good CPU, Get the Pentium G3258(if Z97) or an i3. Granted, many GTX 650's will cost about the same as these CPU options, you should be fine and will be able to upgrade.

[Le Lion de Barreras]

Any CPU in your socket range will work fine with the GPU.  Any CPU and any GPU that I know of do not require a specific CPU or GPU in order for it be compatible. Assuming your motherboard isn't ancient it will work fine.