Unfortunately, in this case monitor drivers
are just as important as video drivers - the video driver
probes the monitor and tries to ascertain what resolutions/refresh rates it supports. If it can't figure it out and the monitor doesn't respond with that data (one or the other), then it assumes what the generic monitor supports. Unfortunately, if you don't have monitor drivers, neither the Intel drivers nor Windows is going to ascertain the correct maximum size or refresh rate (automatically, at least). You'll probably have to go back to XP if you want this to work properly if it worked there.