Motherboard & Cpu Upgrade Opinions

[Rinyk]

Hi, this is my current build :

Processor : Intel Core 2 Duo E4600 @ 2.40 GHz
Motherboard : Dell 0RY007
4 Gigs of DDR2 (4x 1Gig)
Graphics Card : NVIDIA GeForce GTX 650Ti
Dual Monitors : 1 BenQ RL2455 (1920x1080) & 1 Acer X193W (1440x900)

I'm would like to be able to run games like Call of Duty Black Ops 2, Advanced Warfare & mainstream games on more then 40fps (which is my approximate framerate at the moment, it's basically unplayable lol).

I don't need to run these games at max settings at all I just want a really smooth experience.

I live in Canada.

I'm guessing I would need to change the motherboard and cpu and that's it ?

What would you recommand ? I have around 200$ but I can save up for another 200$ maybe if needed.

Edit : I guess I would also need to upgrade to some DDR3 If I upgrade the motherboard too

 

[X79]

You would need to change your motherboard, PSU, RAM, CPU and most likely your case too, for it all to fit.

Pretty much everything. Maybe even your HDD if they use IDE.

PCPartPicker part list / Price breakdown by merchant

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($124.99 @ NCIX)
Motherboard: Gigabyte GA-970A-D3P ATX AM3+/AM3 Motherboard ($79.99 @ NCIX)
Memory: Crucial Ballistix Sport 8GB (1 x 8GB) DDR3-1600 Memory ($76.00 @ Vuugo)
Video Card: EVGA GeForce GTX 750 Ti 2GB Superclocked Video Card ($159.99 @ NCIX)
Total: $440.97
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-04-19 21:44 EDT-0400

Safe to say it's more than a little tough on your budget and with Canadian pricing.

This build doesn't even include Windows and a PSU and harddisk mind you.