Please HELP me Overclock my 880Mx2 SLI GPU

I would be incredibly grateful if someone here could direct me to easy, CLEAR step by step instructions on how to overclock my GPU to a stable overclock for daily gaming. I will include some CPU-Z screens that show you the info you will need; however please note even though CPU-Z detects the 880M VC as 4GB V-Ram, that is actually not the case--each VC has 8GB of V-Ram. 880M SLI.

If you have anymore questions please feel free to ask....

Please HELP me Overclock my 880Mx2 SLI GPU