$750 computer upgrade

[God_Of_War145]

Looking to upgrade my PC and what i want to install is a new MOBO, GPU, and CPU.
Looking to get a Intel I5 processor, with a aftermarket cooler fit for overclocking, a great gaming GPU, and a motherboard to handle I5. I do not plan doing a crossfire/SLI.

 

[socialassassin]

http://ca.pcpartpicker.com/p/1gZVU

or

http://ca.pcpartpicker.com/p/1wuL9

 

[God_Of_War145]

http://ca.pcpartpicker.com/p/1gZVU

Would i need a whole new Windows 7?