Although your NVidia GPU is a MOBILE one, the780M, it is MASSIVELY better than the 765 M I have in my Asus gaming laptop…..you have 4GB of video memory and double the CUDA cores of my GPU. Because your GPU is a 7xx series GPU, you CAN try and “tweak” its performance by using a free program to overclock the ” memory clock” of the GPU. You cannot do this on the 9xx series Maxwell GPUs,but, you CAN do it safely with the 7xx series GPUs. On my laptop, I have the same starting frequency as you for the stock memory clock…2000Mhz. I use the free ” MSI Afterburner” utility to increase that setting to 3000Mhz with NO overheating….for Macs, there must be a similar program to “tweak” your GPU. These programs allow you to monitor the GPU temperature real time, so that you know you are safe. Your video card, being a moble card, is deliberately UNDERCLOCKED at 2000Mhz in order to save battery power in a portable machine. Both Bill Gehrke and I overclock our cards safely and I get about a 20 to 25% increase in performance when the GPU is “saturated” with effects,or, when heavily used during exports. Especially with an overclock and the 4GB of video memory, your GPU is very good.