There is some info on the bios boot screen that doesn't show up in the bios. I know what you mean about it scrolling by quickly - damn those fast pc's. You might be able to catch it with the pause key - takes a lot of practice. With some bios's enabling the memory test (non-quick boot) will enable some info to be viewed.
Every bios I've seen will display the cpu type and speed somewhere. Many don't display the current ram settings or voltages. This usually isn't a problem if using Windows since there are many capable utils available that do: SpeedFan, CPUZ, and PC Wizard to name a few.