3 ms·Keep in mind the MBP 13 with 4 ports has a 28 W chip, while the one with 2 ports has a 15 W chip (IIRC).by abrowne 7y agoKeep in mind the MBP 13 with 4 ports has a 28 W chip, while the one with 2 ports has a 15 W chip (IIRC).