HMScott sent me your way. I'm currently overclocking my MSI GT83VR-6RE Laptop. I'm not sure if I have found the sweet spot for my GPUs. In MSI afterburner i've added +210 to the core clock and +200 to memory. Keeps my clock around 2k. HMScott mentioned something about undervolting the GPU for better performance. MSI afterburner won't allow me to touch any voltage settings as they are all greyed out.