This may be an Nvidia driver issue more than anything but I thought I'd ask and see if anyone has had similar experiences; when outputting to a panasonic LCD tv via HDMI, everything runs quite slowly, machine struggles with low res video playback/youtube even though optimus has selected dGPU. also, overscan cannot be corrected by resizing desktop resolution in Nvidia control panel as you would usually do. The option seems to have been removed from the (Nvidia) Optimus version of the drivers. Wondered if there is a workaround for this? I can't see the iGPU being much good at 1080p movie playback even though it DOES offer cusom resolutions, also, wouldn't mind playing some games on the telly!