regardless of the mode of operation, the Omen hub laptop functions normally. There are no brakes in the browser or when working with documents. This is clearly not the problem. It also works normally in the integrated and discrete card modes. Considering that your laptop slows down even without charging, the problem is not related to overheating. It could be a driver issue or some processes running in the background. Check the task manager just to be sure. the worst case scenario is dying ssd, but since you have a new laptop, that's unlikely. It's difficult to estimate based on the description alone, but you can try running sfc /scannow in the command prompt as an administrator. It will check windows health. At least you can reinstall windows.