OPT-8 Differences

[zachattakk]

Hey everyone!
I apologize if this topic has been discussed... but I couldn't find anything on here when I searched.

While taking a closer look at my OPT-8 cards, I noticed some say "Rev A" and others say "Rev B."

Does anyone know the differences?

Thanks!
-Zach

Keywords: OPT8 OPT 8 OPT-8 RevA RevB Rev A B