I know of no Boeing type which has an Airbus type autotrim system that automatically trims the THS to relieve pitch input. In manual flight, even the 777 and 787 have to be trimmed manually for airspeed using the trim switches.
B777 has no autoreim in that sense, but it is not a conventional THS either. It moves without pilot inputs, same as elevators, depending on actual speed and trim reference speed, which is what you select with the switches.
So, if speed is wrong, if speed is overspeed (for the computers, I mean) what would happen in a B777. Its protections are different tha those of airbus. No uncommanded pitch up or down, but there are forces induced in the control column to cue the pilot. In this case it would mis,ead the pilot, right? It would be too stiff for pushing, I deem...
Computers are computers. They have a big problem. What happens when they are doing the wrong thing without detecting it is tthe wrong thing.