nice, now to explain Nvidia optimus:
"In most cases, the dedicated NVIDIA GPU in a computer that is using NVIDIA Optimus technology cannot directly send data to the display. The display is typically connected directly to the integrated GPU, and the dedicated NVIDIA GPU is connected to the integrated GPU through a high-speed interface, such as PCI Express. This allows the system to use the dedicated NVIDIA GPU for certain workloads, while still using the integrated GPU to handle the display output."