I am planning on getting a GTX 780 GPU and wanted to be sure that my current, m4n68t-m-v2 mobo was compatible with it. I assume it has a PCIe 2.0 slot in it (not positive) rather than a 3.0. Would this be sufficient for the 780?
Your motherboard is a basic budget board not really good for OC so spending the money wisely would be a better path. Something like this http://pcpartpicker.com/p/2RlcE better board that will reuse your CPU and you can upgrade to FX later, GTX770 8GB ram which is plenty for gaming and quality 550watt PSU that will run those specs fine with power to spare. For OC you would need a aftermarket cooler and here is one http://pcpartpicker.com/part/cooler-master-cpu-cooler-rr212e20pkr2
I have an AMD Phenom II X 4 955 CPU. That shouldn't be a problem right? And I am only looking to upgrade my GPU at the moment. I don't have enough $ for a big overhaul. That's why I just wanted to be sure that my mobo would be compatible and suitably efficient for the 780
Will it be a significant amount of bottle necking? I currently have an HD 7770 GPU, would it make the swap not worth it? I will also be buying an 800 PSU to accommodate the card as well as 16g of ram. (as opposed to my current 4g of ram and 500 PSU)
Your motherboard is a basic budget board not really good for OC so spending the money wisely would be a better path. Something like this http://pcpartpicker.com/p/2RlcE better board that will reuse your CPU and you can upgrade to FX later, GTX770 8GB ram which is plenty for gaming and quality 550watt PSU that will run those specs fine with power to spare. For OC you would need a aftermarket cooler and here is one http://pcpartpicker.com/part/cooler-master-cpu-cooler-rr212e20pkr2