Do USB displays use the GPU?
I have an old i7 980 desktop and old Surface Pro 3 tablet. I basically only use the desktop to game. Surface is for everyday browsing. I never travel with the surface. It stays connected to a power cord 24/7. I'm just more comfortable laying down than being at a desk. Rather than replace both with two new machines, the thought hit me of making one build to serve both requirements. I'm picturing a sort of tablet tethered to a PC tower. A tablet that can not only handle gaming, but one that would never get hot. I see "portable touchscreen monitors" for sale that are very similar in form to the Surface. That is what has me confused.
The USB standard appears to be a dumpster fire. Some only say USB C with zero mention of what communication they use. Some have mentioned displayport through USB C. Some have mentioned Thunderbolt through USB C. Would any of these use the PCIe GPU in a desktop? I've seen some displays with HDMI ports, and I obviously could connect that to the GPU for video. They make no mention though if there's a way to retain touch with a USB cable in addition to the HDMI cable.