The first round was slow, not much happened. But Floyd landed 4-5 right hands that won him the round.
The second, Ortiz had his moments here and there. But Floyd still controlled most of the round and landed his punches. Floyd took this round, though it was fairly competitive.
The third, Mayweather whupped Ortiz and was tagging him at will often.
The fourth, Mayweather was whupping Ortiz most of the round, aside from about 5-10 seconds in the round where he landed a couple punches and got Floyd on the ropes. Floyd was winning this round.
Ortiz doesn't have enough elements to his game to beat Floyd.